I have had this coin since childhood and have never been able to identify it. Digging through my desk I run across it every few years. I thought I would try to find out something here.
The coin is round but uneven, approximately 20 mm by 4.2 mm. It weighs 14 grams. It is non-magnetic with some green patina so it may be copper. One side has a script and the other a waffle pattern.
Any info would be appreciated. Thanks.

