Olmo Serial Number Dating Registry

This Olmo Serial Number Dating Registry records Olmos with original dated bike parts or provenance, and sometimes only with decals, in order to attempt correlating an Olmo serial number to a year or year range. Later Olmos with date-able elements are actively added, as well as pre-1978 Olmos. Track/pista and junior bikes are not included.

Not all Olmos have serial numbers. Alphanumeric serial numbers were used before 1970. Numeric serial numbers were used from the late 1970s, and then discontinued. Lower level models may not have serial numbers. Serial numbers are stamped on the seat lug on older bikes, or on the bottom bracket underside on later bikes (sometimes matched by a serial number on the fork steerer tube). A

after the year of an Olmo in this Registry designates uncertainty about its year or range of years. Absence of a question mark means there is some certainty about a bikes year or a range of years, established by parts dating, provenance, etc., or by preceding or following dated bikes.

ATIPO RONDINEdecal may or may not appear on some older Olmo bikes, and refers to theAgrati AM lugs, with rondine meaning swallow. Some older Olmos have the ornateAgrati lugswhich Emilio Bozzi sold as Brianza sportiva lugs; the accompanying Agrati rear dropouts are stamped with a scalloped back. However a few Olmos with Brianza lugs have Rondine decals, so go figure. Olmo produced aVelital brand bicycle.

Dating bikes by bike parts is not an exact science since dated parts could be used into following year(s).

An Olmo with its original Campagnolo parts can be dated from date codes on some of those parts.

Thelock nut on the Campagnolo hub axletypically is stamped with CAM. 60 or some other number denoting the last two digits of the year of manufacture.

Nuovo Record and Super Record rear derailleurs have apatent datethat corresponds to its manufacturing date starting in 1970 (example PAT. 70) and marked PATENT without a date before 1970.

Campagnolo crank arms have a date code starting in 1973, consisting of adiamond (1970s)orcircle (1980s)with a number in the center denoting the last digit of the year of manufacture, and then in 1985-9 withsquare and number in the center: 11 = 1985, 21 = 1986, 31 = 1987, 41 = 1988, 51 = 1989 plus some other examples.

The Campagnolo Gran Sport rear derailleur lost its cable housing adjuster screw around 1960.

The word RECORD was added to Campagnolo hub barrels around 1963.

Campagnolo rear dropouts came with porta catena holes starting in 1976.

Universal Mod 61 centerpull brakes were introduced in 1961.

Weinmann Vainqueur centerpull brakes changed from a single spring to two springs in late 1962.

See MORE dating notes at the bottom of this registry.

Aldo Ross: Swallow rondine lugs withseat lug side slot; chrome head lugs and fork crown; chrome stay ends; Campagnolo Cambio Corsa dropouts and fork ends

ORIGINAL PARTS: Cinelli steel stem, Cinelli aluminum bars, Weinmann brake levers (later), Balilla – Olmo brake calipers, … Brooks Professional saddle, Magistroni cranks, two chainrings (probably changed when used as a commuter bike), Sheffield pedals… Drive-side rear cone is stamped 50, other side is not date stamped, neither are the front cones. G. Caimi freewheel

ORIGINAL PARTS: 17 tooth Campagnolo Corsa dropouts; Same colour etc to David Rapleys bike in Hundred years of steel.

Swallow rondine lugs withseat lug side slot; chrome head lugs and fork crown; chrome stay and fork ends; Campagnolo Cambio Corsa dropouts and fork ends

Swallow rondine lugs withseat lug side slot; chrome head lugs and fork crown; chrome stay and fork ends; Campagnolo Cambio Corsa dropouts and fork ends

ORIGINAL PARTS: 4 speed Campagnolo Cambio Corsa; Campagnolo hubs; Nisi 36 hole rims;Magistroni Senior five pin cranksetwith 48t chainring; Olmo headset; Brooks B17 saddle; Balilla brakes; Silver blue paint

bg.legendary.bikes/eBay: may not be an Olmo; seller does not say it is an Olmo in the listing and description; does not have swallow rondine lugs; chrome forks; Campagnolo Cambio Corsa dropouts and fork ends

REPAINTED… NOT ORIGINAL DECALS: head tube and seat tube decals areOlmo Lazy L star logo. OLMO with red background on left side of top tube is unfamiliar on other Olmos. Bike has later Olmo decals added on seat tube, top tube, and down tube.

jjokcha/eBay: Swallow rondine lugs with no seat lug side slots; chrome head lugs and fork crown; chrome stay and fork ends; Campagnolo Cambio Corsa dropouts and fork ends; no top tube brake cable braze-ons; 5558 stamped on side of seat tube below seat lug [cannot see if theres a serial number stamped behind the seat lug; seller says the frame size is 56 cm]

DECALS: Head badge and seat tube decal withOlmo Lazy L star logo; OLMO in white block letters within white oblong outline on downtube

Swallow rondine lugs with no seat lug side slots; chrome head lugs and fork crown; chrome stay and fork ends; Campagnolo Cambio Corsa dropouts and fork ends; no top tube brake cable braze-ons

ORIGINAL PARTS: Olmo branded handlebars and stem, brake levers, crankset, hubs, headset, seat post collar. Girardi saddle.

Guillermo : Swallow rondine lugs with no seat lug side slots; seat post clamp bolt at front top side of seat lug; forged long horizontal Agrati dropouts with scalloped backs; Headbadge isOlmo Lazy L star logo; shifter braze-on at front of top tube, with cable internal to top tube; generator/dynamo bracket on right front fork; [Rear brake cable runs inside top tube?]; Pump pegs on back of seat tube; Chainguard mount on rear of right chainstay. Fender mounts on lower seatstays and fork blades

ORIGINAL PARTS: Balilla Brevattato brakes;Magistroni Senior five pin cranksetwith single chainring.

German via coventryeagle48/Flickr: Swallow rondine lugs with no seat lug side slots; chrome head lugs, fork crown, fork ends, stay ends and dropouts

DECALS: Olmo in script on downtube; Industria Argentina under Olympic rings at top of downtube; Campionato Italiano Diletta Iti 1942/43 on seat tube;Olympic rings with Olmo stardecal at top of fork legs, and also at transition between paint and chrome on fork legs; OLMO oval on seat tube

pepperbelly/bikeforums.net: Swallow rondine lugs withseat lug side slot; open C Campagnolo dropouts; chrome head and seat lugs; chrome stay ends; chrome fork

cicli2d/eBay: Swallow rondine lugs with no seat lug side slot; internal routing of top tube brake cable; Agrati dropouts; chrome head lugs, fork crown, stay ends and dropouts

Roger Barrett: Swallow rondine lugs withseat lug side slot; Complete machine, nearly all original. Finish was white. Campagnolo 1010 dropouts.

ORIGINAL PARTS: Ambrosio Champion steel stem and Ambrosio Champion alloy bar. Balilla sidepull brakes. Campagnolo Record seat pillar

DATING: Probably the Gran Sport / Professional Regular model since it was not a chromovelato finish.

Sparkee Bartee/Steel is Real FB: Swallow rondine lugs with no seat lug side slot; Campagnolo horizontal dropouts; chrome head lugs and seat lug

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model.

Michael Levy/CR: Swallow rondine lugs with no seat lug side slot; Campagnolo dropouts; chrome head and seat lugs; chrome fork crown; chrome fork tips and seat and chain stay ends; chrome seat tube band

ORIGINAL PARTS: Olmo headset and seat post clamp; Campagnolo Gran Sport derailleurs; Campagnolo seatpost and shifters; Magistroni 3-pin steel crankset; Balilla Brevattato sidepull brakes

DECALS: Not original but presumed to be modelled after original decalsOLMO in Red Oblong Outlineon downtube, edged in bands; On seat tube, OLMO shield over red diamonds on chrome background with color band edges;TIPO RONDINEat top of downtube; MADE IN ITALY andCAMBIO CAMPAGNOLO winged wheelat top of downtube;Olympic rings with Olmo stardecal at top of fork legs

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model. Levy said ca. 1958 or 59? OLMO I believe it is a Professional Regular Road Racing model.

John Siemsen/CR: Swallow rondine lugs with no seat lug side slot; Campagnolo dropouts; chrome head lugs; chrome fork crown; chrome fork tips and seat and chain stay ends; chrome seat tube band; it was not a chromo velato finish, just a faded red.

ORIGINAL PARTS: Except for saddle and Record rear derailleur, and likely rims, looked to be kitted as original with earliest Campagnolo alloy crankset with the pedal dust covers that came out in 1958. Note the steel barrel front hub, and it did have open C QRs. Perhaps not conclusive, but I do believe this bike dated to around 1958 based on the crankset, the BB with pressed on bearing shoulders on the spindle, and hubs. Think I still have these hubs, again I could mis-remember, but think they had CAM 58 on the lock nuts. Spoke count on the wheels is 40/32…. serial was D234. It had Weinmann 999 brakes, Magistroni HS, Ambrosio Champion bar/stem. Cant recall the pedals.

DECALS:OLMO in Red Oblong Outlineon downtube, edged in bands; On seat tube, there are bands but is missing the Olmo shield; MADE IN ITALY at top of seat tube;TIPO RONDINEat top of downtube;Olympic rings with Olmo stardecal at top of fork legs

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model.

ORIGINAL PARTS: appears all original absent wheels…open C (Campagnolo) Gran Sport FD and RD with adjuster barrel… Magistroni cranks/BB and Olmo stamped headset/collar. Ambrosia Champion chrome stem and alloy bar. … Weinmann Vainquer brakes and levers. Early Sheffield sprint pedals. … Italia saddle

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model. Owner: I believe the bike is ~1958. Open C Campagnolo dropouts date to the 1950s

Brandon Ives: Swallow rondine lugs; Campagnolo dropouts, rear dropout is drilled for a Sport rear der

ORIGINAL PARTS: Ambrosio bar and stem, Mafac Dural Forge brakes, … Gran Sport ders with open-C shifters, Campy headset with a groove cut on the outside … Campy seatpost and pedals. Campagnolo high flange no record hubs

DATING: Probably the PROFESSIONAL DELUXE model. (19)58 hub locknet. Owner: My uncle says he bought it in the late 50s… Campy locknuts do say 58. Has the Campagnolo Sport sprung pivot derailleur hole in the right rear dropout, which is 1952+

Kevin Kruger: Swallow rondine lugs with no seat lug side slot; Campagnolo open-C dropouts drilled for Sport rear derailleur; Original primary black paint with cromovelato treatment on top tube, seat tube, and fork blades. Original decals are present but very worn…

DECALS:OLMO shield on red and gold chromovelato panels with four color bandson seat tube; Olmo shield in color panel with bands on down tube;Olympic rings with Olmo stardecal at top of fork legs above a gold chromovelato panel;Olympic rings with Olmo stardecal on top of downtube;CAMBIO CAMPAGNOLO winged wheelon upper seat tube; OLMO shield on top and OLMO ovals on each side with gold and red chromovelato panels on front of top tube; MADE IN ITALY at top of seat tube

DATING: With a chromovelato finish, would be the Gran Sport or Professional models. Open C Campagnolo dropouts date to the 1950s. Has the Campagnolo Sport sprung pivot derailleur hole in the right rear dropout, which is 1952+

ORIGINAL PARTS: … everything Campagnolo with the exception of the BB, which is Magistroni … Mafac brakes, Ambrosio handlebars and post, … Gran Sport derailleurs… Campy HF hubs, … the locknuts has cam and then a 60… Campy head set

Wesley Hatakeyama: The C on the Campagnolo rear dropouts is an open C, a hole on the derailleur hanger for the Campy Sport Derailleur Olmo headbadge, Campagnolo Dropouts Purchased from an original owner, but not complete. I am assuming this frame set is from the late 50s.

ORIGINAL PARTS: Olmo branded steel seat post collar. … Campagnolo Gran Sport drivetrain and Magistroni Cranks, first generation GS pedals and 2nd Generation GS headset with domed nut (many people here in the US thinks this is the first generation, but there are no seals on the bearing races). Ambrosio Champion steel stem and bar. Mafac Dual Forge Brake Calipers. No wheels or brake levers.

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model. 2nd generation Campagnolo Gran Sport pedals with longer threads and no o-ring came out in 1959. Open C Campagnolo dropouts date to the 1950s.

bmx_warehouse1/eBay: Swallow rondine lugs with no seat lug side slot; Agrati AM lugset; Campagnolo 1010 ends; chrome stay ends, fork ends, head lugs, seat tube panel, and front of top tube

DECALS:OLMO in Red Oblong Outlinedecals with OLMO on top tube;Olympic rings with Olmo stardecal at top of fork legs and top of downtube;CAMBIO CAMPAGNOLO winged wheelon upper seat tube;OLMO shield on red and gold chromovelato panels with four color bandson seat tube; MADE IN ITALY at top of seat tube

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model. Has the Campagnolo Sport sprung pivot derailleur hole in the right rear dropout, which is 1952+

Felix Chiu: Swallow rondine lugs with no seat lug side slot; Agrati AM lugset; Campagnolo 1010 ends; chrome stay ends, fork ends, head lugs, and seat tube panel

PARTS: Gran Sport front and rear derailleur with cable adjuster; OLMO headset and seat post collar; Universal Extra BREV 453949 brakes; Cottered crankset, likely Magistroni; Ambrosio Champion handlebars and stem; Ideale 39 saddle

DECALS:OLMO in Red Oblong Outlinedecals;Olympic rings with Olmo stardecal at top of fork legs;TIPO RONDINEat top of downtube;CAMBIO CAMPAGNOLO winged wheelat top of seat tube;OLMO shield on chrome panel with four color bandson seat tube; MADE IN ITALY decal near top of down tube; Reynolds 531 decal on seat tube (false decal? added later?)

DATING: My 58ish has the serial number D622 stamped at the back of the seat-lug. Campagnolo Gran Sport rear derailleur lost its cable adjuster around 1960. If a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model.

brian304/eBay: Swallow rondine lugs with no seat lug side slot; Agrati AM lugset; Campagnolo 1010 dropouts; chrome stay ends, fork ends and crown, head lugs

ORIGINAL PARTS: Magistroni crankset; Campagnolo Gran Sport derailleurs and shifters (rear derailleur without cable housing adjuster); Campagnolo hubs; Olmo headset and seat post collar; Balilla brakes, Ambrosio stem and handlebars; Fiamme rims

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model. Has the Campagnolo Sport sprung pivot derailleur hole in the right rear dropout, which is 1952+

Roger Barrett: Swallow rondine lugs with no seat lug side slot. frame with finish kaput, no transfers, Agrati AM lugset, Campagnolo 1010 ends, semi-sloping crown w/horizontal groove in outer side and reinforcement tangs. Use seat binder collar. Ambrosio Champion steel stem and Ambrosio Champion alloy bar. Balilla sidepull brakes.

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model.

Roger Barrett: Swallow rondine lugs with no seat lug side slot. original finish, red flamboyant over chrome, no transfers, Agrati AM lugset, Campagnolo 1010 ends, semi-sloping crown w/horizontal groove in outer side and reinforcement tangs. Uses seat binder collar. Ambrosio Champion steel stem and Ambrosio Champion alloy bar. Balilla sidepull brakes.

Victor Hernandez/Steel is Real FB: Brianza lugs; chrome head lugs and fork crown; Agrati stamped dropouts with scalloped backs

ORIGINAL PARTS: Magistroni half step crankset and bottom bracket, Huret Allvit rear derailleur (with shield), Huret 600 front derailleur (no slot on top of cage), Huret shifters (pebble finish on lever pads), Balilla Brevatatto brakes, OLMO headset and seat post clamp

Glen Gallo//Gallo/bikeforums.net: Brianza lugs; chrome head lugs and fork crown; chrome stay and fork ends; Agrati stamped dropouts with scalloped backs; no braze-ons

ORIGINAL PARTS: OLMO headset and seat post clamp; Magistroni crankset; Campagnolo shifters with no-D-ring bolt tightened by screwdriver; Nisi Toro rim (original?)

DATING: Probably the Special model due to stamped dropouts. Bike has single-spring anodized Weinmann Vainqueur Deluxe centerpull brakes which may not be original but the single-spring style ceased production in 1962

Rydor Bike Shop: Swallow rondine lugs with no seat lug side slot; chrome head lugs, seatlug and bottom bracket; chrome forks; chrome panel on seat tube; red chromovelato

ORIGINAL PARTS: first generation Campagnolo alloy cotterless crank set … Campagnolo bar end shifters, high flange hubs, steel derailleurs and a TTT alloy adjustable stem. Mafac Racer Dural Forge brakeset.

DECALS: no visible OLMO downtube decals;TIPO RONDINE;Olympic rings with Olmo stardecal at top of fork legs;OLMO shield over red diamonds on gold background with color band edgeson seat tube

DATING: Probably the PROFESSIONAL DELUXE model. First generation Campagnolo alloy cotterless crank with dust caps on the back side of the pedal threading, was produced in 1958, and then the crankarms changed in 1959 to longer threads and no caps; Looks like it has the Campagnolo Gran Sport rear derailleur.

pasqi.it2014/eBay: Swallow rondine lugs with no seat lug side slot; chrome head lugs and fork crown; Agrati stamped dropouts with scalloped backs; pump peg behind seat tube

DECALS: probablyTIPO RONDINEat top of down tube; V under Olympic rings on each side of forks under the fork crown; On seat tube, Olympic ring color bands with Olmo decal like the Olmo head badge; downtube decal looks like the Olmo head badge; on chainguard, OLMO on white oblong background with red outline

Miguel//bikemig/bikeforums.net: Swallow rondine lugs with no seat lug side slot; forged Campagnolo dropouts; chrome head lugs, fork crown, stay and fork ends, and seat tube panel; Falck tubing

PARTS: Magistroni steel crankset with alloy 49-46 chainrings; Ambrosio Champion stem and handlebars; Olmo headset and seatpost collar; Weinmann Vainqueur 999 engraved centerpull brakes with single spring; Campagnolo shifters, Gran Sport front and rear derailleur with cable adjuster; Campagnolo Record high flange hubs; Regina freewheel (14-26); Sheffield Sprint pedals; saddle not original

DECALS:OLMO GRAN SPORT on downtube, with OLMO in white letters;CAMBIO CAMPAGNOLO winged wheelat top of seat tube

DATING: Campagnolo hub locknuts are (19)60; Weinmann Vainqueur 999 center pull brakes changed from one spring to two springs in December 1962, according to Weinmann catalogs; Campagnolo Gran Sport rear derailleur lost its cable adjuster around 1960.

ORIGINAL PARTS: pletely originalincluding fenders, steel stamped Olmo hubs w/ wingnuts, steel stem and bars, steel Magistroni 49/47 crank set. Simplex (made in Italy) derailleurs, the front being the Competition and the rear the Juy-51. Nisi Toro rims and Sheffield pedals.

DECALS: The seat tube decal looks like the head tube badge, no background…TIPO RONDINEon the down tube at the head lug

DATING: Dont know if it is the Special [stamped dropouts] or Gran Sport [forged dropouts] model. Juy 51 made 1951-1957; Competition with metal knob made through 1960, plastic knob made through 1961: Derailleurs of the World, Simplex [Cambio I]

Miramar Road bike rider, seen by Peter Brueggeman: Swallow rondine lugs; Falck tubing; originally gold chromovelato

ORIGINAL PARTS: Mafac centerpull brakes; Campagnolo parts: crankset, pedals, Gran Sport rear derailleur, high flange hubs with straight quick release levers

DATING: Probably the PROFESSIONAL DELUXE model. Provenance: owner purchased it used in 1964, seller said it was 1-3 years old.

McNary: Swallow rondine lugs withseat lug side slot; Campagnolo dropouts; chrome frame stripped of paint/decals

ORIGINAL PARTS: Mafac centerpull brakes; Ambrosio adjustable stem; Campagnolo Gran Sport rear derailleur with cable adjuster, Gran Sport front derailleur, and shifters; Campagnolo crankset and high flange hubs

DATING: Probably the PROFESSIONAL DELUXE model; Campagnolo Gran Sport rear derailleur lost its cable adjuster around 1960; McNary: ..the original owner said he had purchased it in the 60s… the whole bicycle is chromed. the serial number is E128 … I switched out the brakes, from mafac center pull to… and main stem, from an adjustable one to … the hubs, crank, front & rear derailleur and shifters are all original.

bicycledreamer/eBay: Swallow rondine lugs with no seat lug side slots; Campagnolo dropouts; chrome head lugs

ORIGINAL PARTS: OLMO seat post clamp; O seat post bolt nut; Mafac rear centerpull brake hanger; seller said it had Campagnolo parts

DATING: Probably the PROFESSIONAL DELUXE model; Has the Campagnolo Sport sprung pivot derailleur hole in the right rear dropout, which is 1952+

merziac/BikeForums.net; formerly owned by Bruce McCormmach: Swallow rondine lugs with no seat lug side slots; Campagnolo dropouts; chrome fork crown and fork ends, half chainstays and dropouts, head lugs, and seat tube panel; Falck tubing

ORIGINAL PARTS: Campagnolo Gran Sport derailleurs and shifters; Magistroni crankset; Ambrosio Champion handlebars and stem; Mafac brakes; Olmo headset and seat post collar; Campagnolo high flange hubs with straight quick release levers; Wolber sewups

DECALS:OLMO GRAN SPORT on downtube, with OLMO in gold letters;TIPO RONDINEat top of downtube; MADE IN ITALY band at top of seat tube; OLMO CELLE L. decal on seat tube panel; OLMO in star under Olympic rings at top of forks;CAMBIO CAMPAGNOLO winged wheelat top of downtube

DATING: CAM 60 locknut on Campagnolo hub; Gran Sport rear derailleur has cable adjuster which ended in 1960.

ORIGINAL PARTS: Campagnolo Gran Sport components. Magistroni crank-set, Sheffield pedals, … Nisi rims, Ambrosio Champion stem, Mafac brakes. Olmo headset and seat post collar; Olmo three-pin cottered crankarms with Magistroni chainrings; dropout shows the pad around the Campagnolo Sport derailleur hanger hole; Campagnolo high flange hubs with straight quick release levers

DATING: Provenance dates it around 1962. It is the Gran Sport model due to having the forged dropout with the Campagnolo Sport derailleur hole, plus the owner said so. Owner: Olmo Gran Sport … – c. 1961, as originally-equipped This particular Olmo was purchased around 1962 from Ted Ernsts Bicycle Super Mart in Manhattan Beach, CA by a high school mate of mine. Has Gran Sport rear derailleur without cable adjuster which is 1960+.

ORIGINAL PARTS: Olmo seat post collar; Campagnolo shifters, Gran Sport rear derailleur with cable housing adjuster, and Gran Sport front derailleur; Campagnolo crankset, pedals, hubs, and headset; Mafac brakes; Ambrosio handlebars and adjustable stem

David Snyder//dddd/bikeforums.net: Swallow rondine lugs with no seat lug side slot; chrome head lugs; chrome fork and fork crown; chrome stay ends; chrome panel on seat tube; Falck tubing; gold chromovelato paint

ORIGINAL PARTS: Original bike; [151 BCD] Campagnolo earliest (1959 production) crankset… locknut off of each [Campagnolo high flange] hub and both are CAM 61… Gearing is 51-48 and 14-26t; Universal Model 61 centerpull brakes and levers; Ambrosio Super Corsa handlebar stem; Fiamme Red Label rims; Campagnolo Record front derailleur and Gran Sport rear derailleur with 8mm spring cover; Campagnolo bar-end shifters; Campagnolo Record pedals

DATING: (19)61 hub locknet which could be on a 1962 bike; Universal 61 brakes date it to 1961+. First generation Campagnolo alloy cotterless crank with dust caps on the back side of the pedal threading, was produced in 1958, and then the crankarms changed in 1959 to longer threads and no caps;

retyred/bikeforums.net: Swallow rondine lugs with no seat lug side slot; chrome head lugs; chrome fork crown and fork ends; chrome stay ends and forged dropouts; chrome panel on seat tube; red paint (not chromovelato)

jcdent1970/eBay: Swallow rondine lugs with no seat lug side slot; chrome stay ends; chrome Campagnolo dropouts with the Campagnolo Sport derailleur hanger hole

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model. Has the Campagnolo Sport sprung pivot derailleur hole in the right rear dropout, which is 1952+

Peter Brueggeman: Swallow rondine lugs with no seat lug side slot; chrome head lugs and forks; chrome stay ends and seat tube section; Campagnolo dropout has Sport derailleur hole; gold chromovelato

ORIGINAL PARTS: Original bike. Campagnolo Gran Sport rear derailleur without cable adjuster; Nitor seatpost; Campagnolo high flange hubs with no-Record barrel & (19)63 locknut; Campagnolo headset with non-domed locknut; headset cups marked BREV. CAMPAGNOLO ITALY; Campagnolo 170mm 151 BCD crankset with 51-46 chainrings; Campagnolo bottom bracket

Campagnolo Record front derailleur; Campagnolo bar-end shifters; Campagnolo Record pedals; Universal Model 61 centerpull brakes and levers; Unicanitor saddle; Ambrosio Super Corsa handlebar stem; Ambrosio Champion handlebars; white textured handlebar tape; white ribbed brake cable housing; Universal brake pads; Regina Gran Sport Corse freewheel

; Regina SC chain; Fiamme Red Label rims; White Universal brake hoods had red inking in its Universal embossed designs on side of hoods

DATING: (19)63 hub locknet; Campagnolo headset with non-domed locknut was new for 1963; Ron Kitching 1963 Everything Cycling catalogue says this style of Nitor seatpost is new for 1963; 1963 was likely the last year for the Gran Sport rear derailleur to be in a top-level Campagnolo parts group

Bob Freeman: Original blue paint with lugs lined in white; Swallow rondine lugs with no seat lug side slot; chrome fork crown; chrome Campagnolo dropouts

DECALS: OLMO in block blue letters edged in white within elongated white edged oval on downtube; OLMO in red letters with white background under fork crown;CAMBIO CAMPAGNOLO winged wheelat top of seat tube

DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model.

DehesaRoadGate: Swallow rondine lugs with no seat lug side slot; Campagnolo dropouts; replacement fork

ORIGINAL PARTS: Olmo headset and seat post clamp; Campagnolo hubs; Ambrosio Champion stem and handlebars; Magistroni 3-pin steel crankset; Balilla Brevattato sidepull brakes;

NOT ORIGINAL PART?: Huret 600 front derailleur (perhaps original to the bike; this type of 600 came out around 1965, slot in top of derailleur cage, simple engraved Huret on cage and clamping band)

caraisin5/eBay: Brianza sportiva lugs; Agrati stamped dropouts with scalloped backs; replacement fork

Jantaras/BikeForums: Brianza sportiva lugs; Agrati stamped dropouts with scalloped backs; rear rack mounting plate; chainguard mounting tab on right seat stay; internal brake cable on top tube; chrome seat tube center, head lugs, stay ends, fork ends

CLR Effect: Brianza sportiva lugs; chrome head lugs and fork crown; chrome stay and fork ends; Agrati stamped dropouts with scalloped backs

ORIGINAL PARTS: Balilla Brevettato sidepull brakes; Ambrosio stem and handlebars; Magistroni three pin half step crankset; Campagnolo Gran Sport front and rear derailleurs (with cable adjuster) and shifters; Olmo headset and seat post clamp;

DATING: Probably the Special model due to stamped dropouts. Gran Sport rear derailleur with the cable tension adjuster ended around 1960.

Victor Hernandez/Steel is Real FB: Brianza sportiva lugs; chrome head lugs and fork crown; chrome stay and fork ends; Agrati stamped dropouts with scalloped backs

ORIGINAL PARTS: Campagnolo Gran Sport front and rear derailleurs (with cable adjuster on rear derailleur) and shifters; Olmo headset and seat post clamp;

Adam Waltke/Steel Is Real FB: Swallow rondine lugs withseat lug side slot;; Campagnolo dropouts; chrome head lugs and fork; chrome seat and chain stay ends; chrome panel on seat tube

ORIGINAL PARTS: Campagnolo Gran Sport front and rear derailleurs (with cable adjuster on rear derailleur) and shifters; Campagnolo three piece hubs; Magistroni crankset

Bikerider007/bikeforums.net: Brianza lugs; Agrati stamped dropouts with scalloped backs; chrome head lugs and fork crown

ORIGINAL PARTS: OLMO crankset; bottom bracket axle stamped C; Universal 61 brakes; Weinmann brake levers; Campagnolo Gran Sport derailleurs (rear without cable housing adjuster) and shifters; OLMO headset and seat post collar OLMO hubs; Sheffield pedals Ambrosio handlebars and stem

DECALS:Olmo Special in white script edged in redon downtube; OLMO logo on seat tube;Olympic rings with Olmo stardecal at top of fork legs;TIPO RONDINEat top of downtube

Don S: Brianza sportiva lugs; chrome head lugs and fork crown; Rear derailleur cable runs inside the downtube below shifter; Rear brake cable runs inside top tube

O