Is this just a random stamp on the back of this W572? Nefarious? Thoughts? It didn't cost much from a very good hobby friend, so no big deal either way.
(It doesn't fluoresce under a blacklight, Frank W.

)
After a quick bit of research, using Google + Net54, it does look like these stamps were done recently to deceive. I had even commented a few times in the thread but that was 14+ yrs ago...
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