Exception is letter S, used on all frames prior to 1975. Y is a letter indicating the last digit of the manufacturing calendar year, where A =1, B = 2, C = 3… J = 0. X is a letter indicating the market using the following codes: Kawamura manufactured frames (1972-1987*) General developments in the database will be reported in this post (ie post #1 ) below: Where possible, I will answer questions as they arise. Thank-you in advance for your contributions. ![]() For component date code format, location and decypher, refer to Date of Manufacture of Bicycle Components can be used to date a bike: component dating. Requested info is model, year (if known), frame material and make, model and date codes of major components. ![]() ![]() A full, drive side view is the preferred pic. To this end, it would appreciated if any Nishiki owners would submit posts with pics and specs of their Nihiki. I now have sufficient data sets and confidence to report the results for serial numbers from the 1970s to mid 1980s, however sufficient data is lacking for the late 1980s onward. ![]() As some you may be aware, I have been collecting Nishiki data for several years in an attempt to more accurately determine their age and create a timeline of models.
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