My good friend Paul Sokk from Australia (www.yashicatlr.com) has compiled a great database of almost all of Yashica’s cameras and by decoding serial numbers we’ve been able to come up with a list of manufacturing dates. So, by using these serial numbers here is a general list of when the following models were first and last made.
Penta J Aug 1961 to Aug 1965
Reflex 35 Mar 1962 to Jan 1964
J-3 Nov 1962 to Sep 1964
J-5 Mar 1964 to Jun 1965
J-P Aug 1964 to Sep 1966
J-4 Mar 1965 to Jun 1965
J-7 Nov 1966 to Dec 1967

The Pnnta J was the first modern style SLR from Yashica with the universal M42 screw mount for a wide variety of lenses. It was the first model after the Pentamatic S. The J-3 was the first model that had a coupled CdS light meter built into the camera’s left shoulder.


One final note. The serial numbers tell when the camera was produced, not when a camera was released for sale to the public. I believe this list represents the most accurate timeline of these early models from Yashica. Many thanks to Paul for his efforts to compile the most accurate data to date. There is no one better.
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