> From: John Hermanson <jhermanson21@xxxxxxxxx>
>
>
> "S" factory code is "old" code for "New" factory code NA
And what factory is "NA?"
I have at least one pre-1980 lens with a three-character code under the rubber
focus ring that starts with "S".
Also, I think they shifted from "XYZ" for October, November, December, to "ABC"
at some point, probably when they started the four-character codes. I have one
lens with an "A" in the last position.
Jan
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