I have a 300 year commemorative coin that was given to me, on one side it says "300th ANNIVERSARY of THE FoUNDING of THE CITY of NEW YORK" and 1664 - 1964 on one side, and "MAN'S ACHEIVEMENTS IN AN EXPANDING UNIVERSE" and "NEW YORK WORLD'S FAIR" on the other side. Just curious if anyone has ever heard of this coin\medal and knows where and why it originated. Feels very heavy, not sure but it looks more like silver than anything else...

