That is the date of an archived post on discussing Electro 35 serial numbers where a forum member presented a crude Google translation of the date code theory he had found on a Chinese website. The reason I say this is that in late 2017, I have become aware that an unknown Chinese person solved the puzzle, certainly for post 1960 non-SLRs, including TLRs, at least as long ago as August 2006. ![]() Together, we solved the YF and other SLR patterns until from late 1968, they again followed the TLR system (the cut-off for our investigations was the introduction of the Contax RTS and the Contax/Yashica mount). Contributor Chris Whelan worked out that the YE rangefinder and Pentamatic SLR also used date codes but the implementation was a little different to the other models. The working out of the date codes and serial number patterns for the TLRs and some of the non-SLRs presented here is entirely my own work. Location of Body Serial Numbers Acknowledgement The Yashica Spares System Theory - the Impact on Serial NumbersÄo These Patterns and Date Codes Exist for Other Format Yashica Models? ![]() ![]() 7 Digit Numbers - Correlation to Model Release and End Dates
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