Found this atop an hvac duct when I moved into my new home. I wish I knew more about it, although I assume it's circa mid 1940sGustopherus-the-2nd t1_j9fs2i5 wrote
Reply to comment by Busman123 in Found this atop an hvac duct when I moved into my new home. I wish I knew more about it, although I assume it's circa mid 1940s by Dramatic-Scratch5410
He, in fact, took the photo himself and invented the processing technology to get it developed.
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