In case that a watch was produced in two different factories, the subsums for factory where then added up.
VINTAGE SEIKO WATCH SERIAL NUMBERS SERIAL NUMBER
All cases were built into actual watchesįor the analysis of absolute production numbers, the dataset was thus evaluated for the maximum serial number per calibre/case/subcase/factory code/YM combination and all the maxima over the production timeframe were summed up.Each Factory code has an own serial number (if thus watches were produced in two different factories within the same month, both factories applied their own serial number).
VINTAGE SEIKO WATCH SERIAL NUMBERS SERIAL NUMBERS
Serial numbers are reset once a month, first watch produced carries serial number YM0000.g., separate serial numbers for 6309-7040 vs. Each case/subcase combination has an own serial number (e.The data I will present are thus to be interpreted as ballpark numbers but in my opinion are (1) the best data available so far and (2) should give at least a good impression of which numbers we are dealing with beyond orders of magnitude.ĭata for 6-digit watches are thus are based on the following assumptions: Seikos have the date of manufacture written into the serial number which is engraved on the back of the watch also the movement-model numbers are also engraved onto the case back. There are however exceptions to this rule. Every Seiko watch manufactured is given a 6-digit serial number. Furthermore, it must be clearly noted that the data in my archive are not yet at all sufficient to allow an accurate determination of absolute numbers. In a standard six-digit serial code, the first digit represents the production year, the second digit represents the production month, and the remaining four digits represent the production number. FOR SALE Seiko 5 Automatic Mens Vintage Watch, used, Dual English and. At this stage, I can only present data on watches with the 6-digit serial numbering system, I have not yet found a way to interpret the 7-digit that makes sense to me. SEIKO 5 AUTOMATIC vintage mens watch, serial number 6509-8500, Pepsi Dial - 25.00. This is the first time I try to publish some figures on the absolute production numbers of the series I study.