I have the 1920 (I am in error, it is 1930) memo copy, and I'm sure Dave S. sent it to me when we were discussing the 1/2 frame on this forum. I'll try to find it in my 1/2 frame file. OK, I found the blueprint. It is, for sure, a 1930 document. The date is written less than clearly, and I mistook the 3 for a 2 years ago.
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