PLEASE FOLLOW OUR E BAY STORE. PLEASE READ WHOLE ADD. We do not want your feed back. We want your repeat business. We get by having best prices on the net. 50 cents 0.50 US dollars. 30.61 mm (1.20 in). 2.15 mm (0.08 in). 100,057 (100,000 coins were authorized). None, all pieces struck at the Philadelphia Mint. Since 1936, no new commemorative coins had been approved, as the many abuses and scandals involved with past commemorative coin issues had caused both Congress and then-president Franklin D. To oppose any bills for new commemoratives, especially after a Congressional hearing held on April 15, 1937. However, with Harry S. In office, the state of Iowa was able to get the bill for the Iowa Centennial half dollar passed on August 7, 1946. The bill authorized a minimum of 100,000 coins to be minted. Former mint engraver Adam Pietz was selected by Mint director Nellie Tayloe Ross. To design and sculpt the coin.