2004 Commemorative Lewis & Clark Bicentennial Dollar OGP US Mint Here we are offering the 2004 PROOF Lewis & Clark Bicentennial Silver Dollar commemorative. The coin was produced to commemorate the bicentennial of the Lewis and Clark Expedition. The Lewis and Clark expedition (1804-1806) was the first United States overland expedition to the Pacific coast and back. Silver Dollar Specifications:Condition is PROOF Philadelphia Mint Weight is 26.73 grams Diameter is 1.500 inches or 38.10 mm Composition is 90%25 silver and 10%25 copper Mintage 351,989 This be We package our items with quality packaging materials and ship within 1 business day when possible.