My eyeballs hurt trying to figure this out-anyone else see letters/wording?
5MNMP? There is something before the 5 I cannot make put. Maybe a K or Y?!
I cropped and sharpened the image for others.
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Thank You 
Odd isn’t it?!?
MNMP is an old time abbreviation for Minneapolis Minnesota.
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That certainly adds to the mystery…
Now I wonder if this is a coin or piece of something else w/that stamping that was repurposed.
Thank You for checking it out
Could you show a photo of the entire piece?
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