1962 sample ad Mantle mini blank back reprint?
Hello, I have a mini card that I discovered that seems to be like a sample ad card only smaller (just under under 2x3) and the back is a bit more glossy and colored almost like how one would describe the appearance of a magnet on the back of a photo (but is not a magnet). Does anyone have a clue as to what this is or where it may have come from, whether authentic or not? They appear possibly hand cut but if so was an extremely well done job. Attachments provided (referencing card on left).
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