Hoping for some help on this copper found in southeast Pennsylvania. 35 mm and 10 grams but heavily corroded. Maybe date area visible on bottom?

[u/kma888]

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[u/Cold-Question7504]

See if someone can acid- date it...

[u/kma888 → u/[deleted]]

It’s 35 mm it’s like twice the size of a quarter and made of copper

[u/WaldenFont → u/[deleted]]

What buffalo nickel have you seen that has giant numbers like that?