This is mostly a curiosity thing. It certainly doesn't affect actual photos.
But does anyone know or have a guess?
From the auction site, it seems the highest serial numbers I could find were for the 90mm Angulon in the 11,400,000's. Well, I found one that high, at least. There were a few more in the 11,300,000's.
11,000,000 = 11/1968
11,500,000 = 07/1970
Most other focal lengths stop in the 9,000,000's. The highest I could find for any other focal length was a 165mm Angulon with the serial #9,906,521, mounted natively in a Compur Electronic #3
9,500,000 = 09/1965
10,000,000 = 01/1967
I'm guessing these are pretty close to the end of the line? That Angulon production end before 1970?
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