This is as interesting as it could be. I never heard of it before. I wonder if it was a military hold-over from a previous time.
Thank you all for the EXCELLENT information. Of course, with knowledge comes questions. Can you tell which are made in the U.S. and which in...
Can someone please tell me what these are called? The largest is 4 x 2 1/4 inches. The backs are blank. They don't advertise anything. I'd like to...
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