1905 Lewis and Clark Centennial Exposition. Official Medal. Bronze. 34 mm. HK-327. Rarity-5. MS-66 (NGC). Splendid antique golden-rose surfaces are as smooth an inviting as we have ever described for a bronze striking from these dies. Sharp, inviting and worthy of the strongest bids. The obverse design features Columbia striding with explorers toward the setting sun, on the reverse a detailed West Coast map provides shipping routes. This is the official medal type of the 1905 Lewis and Clark Centennial Exposition, held to commemorate the 100th anniversary of exploration of the Louisiana Territory and Oregon County by Meriwether Lewis and William Clark. From the Richard Jewell Collection.