1977 13¢ Energy Mint Pair

United States #1723 13¢ Energy Conservation Mint Single

United States #1724 13¢ Energy Development Mint Single

United States #1704 13¢ Princeton Mint Single

United States #1709 13¢ Acoma Mint Single

United States #1719 13¢ Wheelwright Mint Single

United States #1718 13¢ Blacksmith Mint Single

United States #1708 13¢ Hopi Mint Single

United States #1706 13¢ Zia Mint Single

United States #1720 13¢ Leatherworker Mint Single