Just was out testing my metal detector and I found this: Its a 1964-65 New York World Fair Coin its says:The 300th anniversary of the founding of New York1664-1964. The other side says:Man's achievements in an expanding universe. Can't find much about the history online yet. But it is .999 pure silver and wieghs about thte same as 2 or 3 half dollars. This it the best find I have found ever!!!