http://news.coinupdate.com/panama-pacific-half-dollar-commemorative-coin-1369/ 1915-S Panama Pacific Half Dollar May 11, 2012 By Dennis Hengeveld Leave a Comment After the Lafayette Silver Dollars were sold in 1900, it would take fifteen years for the next silver commemorative coin to be released. This was the 1915-S Panama Pacific Half Dollar, which represented only the second commemorative half dollar from the United States Mint. The half dollar was issued in conjunction with the Panama Pacific Exposition held that year in San Francisco. Several other commemorative coins were issued for the occasion including a gold dollar, a quarter eagle, and two $50 gold pieces. The Panama Pacific Half Dollar is considered to be one of the most attractive classic commemorative half dollars and has been popular since the exposition.