1983 Alexander Calder Half-Ounce Gold Medal 
(1207-9550)
Heritage Auctions (image); U.S. Mint (gold commemorative medal)
Heritage Auctions <a rel="nofollow" class="external text" href="https://coins.ha.com/itm/modern-bullion-coins/us-bullion-coins/1983-ms-alexander-calder-half-ounce-gold-medal-ms67-pcgs-pcgs-population-76-40-ngc-census-42-82-/a/1207-9550.s">Lot 9550</a>, 13 July 2014