Very cool find.. I talked to an old man back several years ago. He got to talking about coins, not thinking much about it at the time. He said, let me tell you a story..
He went on about how the U.S.A was out of money during WW1. And started talking about how some man up in New York wanted to help the U.S. But he was from England, said this guy went on over to Europe and saved up some money for the U.S so they could get new rifles because our were so old and worn out, he came back with enough money for America to buy the new weapons. So the President at the time, made a special coin with the star of david on it, just for thanks..
The story has half way slipped my mind, but it was a wonderful story, with alot of history. Coin's are VERY cool.