1876 U.S. Centennial Exposition. Exposition Building Dollar--Art Gallery. White Metal. 43 mm. HK-84. Rarity-6. Mint State, Environmental Damage.This lot includes the original circular cardboard box for the medal issued by Hartell & Letchworth. On the box is the printed inscription MANUFACTURED BY HARTELL & LETCHWORTH 15 NORTH 5TH ST. PHILADA. / TRADE MARK / CENTENNIAL / REGISTERED / MAY 20TH, / 1873.