"THE STATE OF OKLAHOMA DIAMOND JUBILEE MEDILLION This lot has a Commemorative Bronze Medallion Coin. The large 2-1/2"" coin. The front features ""THE STATE OF OKLAHOMA"" with cattle, oil wells, Indian chief & pioneers on the prairie. The back features ""You're Doing Fine Oklahoma * 1907-1982 Diamond Jubilee."" The original description pamphlet is included. The official limited edition medallion of Oklahoma's Diamond Jubilee was unveiled on Monday, December 14, 1981 in the Governor's Conference Room at the State Capitol. Award Design Medals, Inc., an Oklahoma based firm, produced the medal using the ancient lost-wax process. "