1976 13¢ Chemistry Mint Single

United States #1685 13¢ Chemistry Mint Sheet of 50 *Plate number and position may vary from image shown.

United States #1668 13¢ Nevada Mint Single

United States #1675 13¢ Idaho Mint Single

United States #1661 13¢ Iowa Mint Single

United States #1647 13¢ Kentucky Mint Single