A British penny from 1927 was the oldest coin there, the rest were from a variety of places, Mexico, Germany, Canada. I didn't expect a fortune, but I knew it would be worth the effort. The challenge was how.
The next challenge was how I could remove the wood and glue without scatting the coin
Now this does go against the whole idea of what makes rare and antique items valuable. Fair warning: Acetone is highly flammable and the fumes are also not safe to breathe. Coins should never be casually washed in acetone as there is the danger that you could wash off some or all of the value; patina is the dirt and grime and aged look that make these coins desirable.
For my purposes, this was just the trick. In fact, I dunked 10 coins at a time and the glue and wood slipped right off.
The result was 47 coins of undetermined value that I will now research for what they are worth. This was a fun discovery and a good lesson in coin handling.