UNITED STATES. Panama-Pacific International Exposition, 1915. Official Medal. San Francisco. Gilt "So Called Dollar" 25.65 gm. 38 mm. The official medal (gilt). Winged Mercury opening the Panama Canal locks; the Argo (from Jason and the Argonaughts, a symbol of navigation) sailing through; "ON! SAIL ON! in small letters below left; TO COMMEMORATE THE OPENING OF THE PANAMA CANAL MCMXV around / Two female figures representing the hemispheres reaching across a globe holding cornucopias, a seagull below; PANAMA PACIFIC INTERNATIONAL EXPOSITION SAN FRANCISCO CALIFORNIA MCMXV around. HK 401. Lustrous Extremely Fine; gilt rubbed through in high spots.