Tire manufacture dating

Magistroni cranks/BB and Olmo stamped headset/collar. Olmo Professional Deluxe 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. Campy head set"; [don't know if lugs and fork are chrome, as in Professional Deluxe model, re: 1961 catalog] DECALS: "Olmo decal in the front" DATING: (19)60 hub locknet. Olmo Professional Deluxe 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. No wheels or brake levers." DECALS: "No decals visible." DATING: 2nd generation Campagnolo Gran Sport pedals with longer threads and no o-ring came out in 1959. Has the Campagnolo Sport sprung pivot derailleur hole in the right rear dropout, which is 1952 Serial Number D503 1960?

Original decals are present but very worn..." PARTIAL GOLD & RED CROMOVELATO PAINT: gold & red cromovelato on front of top tube, middle of seat tube, and top of fork blades ORIGINAL PARTS: OLMO seat post collar DECALS: OLMO shield on red and gold cromovelato panels with four color bands on seat tube; Olmo shield in color panel with bands on down tube; Olympic rings with Olmo star decal at top of fork legs above a gold cromovelato panel; Olympic rings with Olmo star decal on top of downtube; CAMBIO CAMPAGNOLO winged wheel on upper seat tube; OLMO shield on top and OLMO ovals on each side with gold and red cromovelato panels on front of top tube; MADE IN ITALY at top of seat tube DATING: Open C Campagnolo dropouts date to the 1950s. I am assuming this frame set is from the late 50s."; [don't know if lugs and fork are chrome, as in Professional Deluxe model, re: 1961 catalog] 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). Olmo Professional Deluxe bmx_warehouse1/e Bay: Swallow rondine lugs with no seat lug side slot; Campagnolo 1010 ends; chrome stay ends, fork ends, head lugs, seat tube panel, and front of top tube PARTIAL GOLD CROMOVELATO PAINT: gold cromovelato on front of top tube, middle of seat tube, and top of fork blades ORIGINAL PARTS: Magistroni bottom bracket DECALS: OLMO in Red Oblong Outline decals with OLMO on top tube; Olympic rings with Olmo star decal at top of fork legs and top of downtube; CAMBIO CAMPAGNOLO winged wheel on upper seat tube; OLMO shield on red and gold cromovelato panels with four color bands on seat tube; MADE IN ITALY at top of seat tube DATING: Has the Campagnolo Sport sprung pivot derailleur hole in the right rear dropout, which is 1952 Serial Number D622 1960?

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Olmo Professional Deluxe 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 CROMOVELATO PAINT BRAZE-ONS: top tube brake cable ORIGINAL PARTS: "first generation Campagnolo alloy cotterless crank set ...Drive-side rear cone is stamped "50", other side is not date stamped, neither are the front cones. Caimi freewheel DATING: (19)50 stamped on hub cone Cannot see Serial Number 1947 Olmo Rondine Swallow rondine lugs with seat lug side slot; chrome head lugs and fork crown; chrome stay and fork ends; Campagnolo Cambio Corsa dropouts and fork ends Serial Number M115 1948?Olmo Rondine David Rapley/Racing Bicycles: 100 years of Steel, pp 100-101. Numeric serial numbers were used from the late 1970s, and then discontinued. 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). after the year of an Olmo in this Registry designates uncertainty about its year or range of years.However a few Olmos with Brianza lugs have Rondine decals, so go figure. Dating bikes by bike parts is not an exact science since dated parts could be used into following year(s).

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