Please note that fender serial numbers tend to overlap by at least a year, and thereby the date of your guitar can only be approximated.
Determining the date of a York instrument made in Grand Rapids, Michigan is rather problematic because no records are available.
Custom Shop, Made in Japan, 1997-2003: Letter-letter-###, like so: NK333.
Despite purchasing all of the assets of the Adolphe Sax Company in 1928, Selmer did not start selling saxophones bearing the Adolphe Sax name until 1931.
Absence of a question mark means there is some certainty about a bike's year or a range of years, established by parts dating, provenance, etc., or by preceding or following dated bikes. Olmo Rondine David Rapley/Racing Bicycles: 100 years of Steel, pp 100-101.
Google Books 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 BRAZE-ONS: top tube brake cable ORIGINAL PARTS: 4 speed Campagnolo Cambio Corsa; Campagnolo hubs; Nisi 36 hole rims; Magistroni Senior five pin crankset with 48t chainring; Olmo headset; Brooks B17 saddle; Balilla brakes; Silver blue paint DECALS: decal remnant on top of seat tube; otherwise, none DATING: book author says bike is 1948, from an Olmo team mechanic Serial Number 889 1946-1951? bg.legendary.bikes/e Bay: Seller does not say it is an Olmo in the listing and description; says it has Olmo stickers (bike may not be an Olmo?
Following the list are the facts and assumptions which were used to create it.
Yamaha serial numbers are recycled every ten years, 29 formats are supported here based on research available on the yamaha website.
There is some overlap between formats and in those cases multiple results will be generated.
Bike has later Olmo decals added on seat tube, top tube, and down tube. Olmo jjokcha/e Bay: 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 there's a serial number stamped behind the seat lug; seller says the frame size is 56 cm] DECALS: Head badge and seat tube decal with Olmo 'Lazy L' star logo; OLMO in white block letters within white oblong outline on downtube Serial Number 108 1950s? Olmo Sport Guillermo Pelegrina//docbilly/bikeforums.net: 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 is Olmo '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?
Olmo city bike ORIGINAL PARTS: Olmo branded handlebars and stem, brake levers, crankset, hubs, headset, seat post collar. ]; Pump pegs on back of seat tube; Chainguard mount on rear of right chainstay. Italia saddle" DATING: if a chromovelato finish was the top model, then this was probably the Gran Sport / Professional Regular model.