1939-D 50C Oregon 
(352-4304)
Heritage Auctions (image); U.S. Mint (coin)
Heritage Auctions <a rel="nofollow" class="external text" href="https://coins.ha.com/itm/commemorative-silver/classic-commemoratives/1939-d-50c-oregon-ms68-pcgs-this-was-the-final-year-and-lowest-mintage-of-all-the-oregon-trail-coins-this-superb-snow-wh/a/352-4304.s">Lot 4304</a>, 18 August 2004