Vintage Bicentennial Belt Buckle. This belt buckle celebrates the Unites States 200th Birthday which took place on July 4, 1976. The buckle is made of solid Brass, it weighs 3.3 ounces and measure 3 9/16 x 2 1/8 inches. The metal is in very good condition, this buckle will make a very fine addition to your belt buckle collection.