Merc year identification

[Channon]

Is there anyway to clean this up to identify the last digit?

 

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[NEPA History]

You can try electrolysis, or get some wet baking soda and rub it between your fingers. Keep in mind, this may put tiny scratches on the coin, but it looks toasted anyway.. good luck

 

[ron lord]

white vinegar and salt works great.

 

[Rookster]

Hope you get the ID. Congrats