1960-1979

United States #1724 13¢ Energy Development Mint Single

United States #1723-24 13¢ Energy Mint Pair

United States #1722 13¢ Herkimer at Oriskany Mint Single

United States #1708 13¢ Hopi Mint Single

United States #1720 13¢ Leatherworker Mint Single

United States #1721 13¢ Peace Bridge Mint Single

United States #1704 13¢ Princeton Mint Single

United States #1730 13¢ Rural Mailbox Christmas Mint Single

United States #1707 13¢ San Ildefonso Mint Single

United States #1727 13¢ Talking Pictures Mint Single

United States #1710 13¢ Transatlantic Flight Mint Single

United States #1729 13¢ Washington Christmas Mint Single