Y = number indicating last digit of calendar year (i.e. M = letter indicating month of manfacture (i.e. KATAKURA MANUFACTURED FRAMES (1971-1973*) The serial number format may extend beyond this range, in either direction, but to date no examples have been reported. The serial number format appears to be started in 1987 and is known to extend beyond 1989 on Giant branded models, though no Nishiki examples have been reported to date.Ĭirca 1989, Nishiki was acquired by Derby International, which also owned Raleigh and some manufacturing was done at their Kent, Washington facility.ĮXAMPLE: R9035167879 is the 7,879th frmae built on day 35 (i.e. Xxxxx = numbers probably indicating a sequential manufacturing number during the fortnight.ĮXAMPLE: GD706959 was the 6,959th frame manufactured during the 4th fornight of 1987. Y = last digit of calendar year of manufacture (i.e. The format precedes 1978 though no samples have been reported on Nishiki bicycles.į = letter indicating fortnight (i.e. *The serial number format changed in 1987. Yy = Year where 80 = 1980, 81 = 1981, etc.ĮXAMPLE: G0384 is a frame that was manufactured by Giant in March of 1984. Mm = month where 01 = Jan, 02 = Feb, etc. The date codes data is generally stamped on the drive side dropout. Two part serial number, with first part designating manufacturer, month and year. Serial number format may extend beyond the stated end date but there are no reported examples, to date. ZZZZZ is a five or six digit number, possibly representing a sequential frame manufacturing number for the year (or era in the case of pre 1975 frames).Įxample 1: KA24587 is the 24,587th frame produced in 1981 for the US market Example 2: CG23117 is the 23,117th frame produced in 1977 for the Canadian market Example 3: WE54612 is the 54,612th frame produced in 1985 for the US market.
Exception is letter S, used on all frames prior to 1975).
Serial Numbers for Nishiki bikes were decoded by Tom Marshall, Canadian engineer, racer and runner, using a trial and error database methodology
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