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1919 Mercury dime with cool mechanical doubling, Not a doubled die!!!

On the date, some nice MD. The Y doubling I can't explain. Cool nonetheless.
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ya, that last 9 makes ya hope!!!
the thing with the Y is most likely just a scratch or artifact on the surface. SOMETIMES, it is a little extra metal scraped off the nearest device aka pmd.
That being a 1919, I assume you checked the motto for being doubled. Cheers, RickO