United States Mint, Philadelphia. Obverse: Bust of Thomas Jefferson facing left. Reverse: Clasped hands, crossed peace pipe and hatchet above; PEACE/AND/FRIENDSHIP. This medal is hollow, consisting of two thin, embossed silver plates, one for each side of the medal. The two were held together by a silver ring, running around the entire circumference of the piece. The medal was created in this fashion because the United States Mint lacked a coining press strong enough to strike heavy, solid medals. This medal accompanied Lewis and Clark on their epochal journey West.