Removing Adhesive On Coins

Thanks for your help, everyone! I'll try an acetone bath and report back the results.

Thank you! You comment led me to read up on horn silver. So much to learn! I'll be curious to see what the acetone will do to that coin and perhaps that'll illuminate exactly what it is. I'll do that coin in the second batch; I'm still soaking the first batch. After 12 hours, most of the adhesive has come off with some gentle rubbing with a Q-tip, but what was embedded between letters, etc., will need a longer soak. We'll see in another 12 hours.

Wow - they're beautiful, bdcline!