1970-1979

United States #1501 8¢ Progress in Electronics - Transistors & Printed Circuits Plate Block

United States #1485 8¢ Robinson Jeffers - Poet Plate Block

United States #1487 8¢ Willa Cather - Novelist Plate Block

United States #1550 10¢ Christmas - Angel Plate Block

United States #1551 10¢ Christmas - Currier & Ives Plate Block

United States #1547 10¢ Energy Conservation Plate Block

United States #1527 10¢ Environment EXPO Plate Block

United States #1542 10¢ Fort Harrod Bicentennial Plate Block

United States #1548 10¢ Legend of Sleepy Hollow Plate Block

United States #1538-41 10¢ Mineral Heritage - 4 Varieties, Attached Plate Block Varieties: #1538 - Petrified Wood #1539 - Tourmaline #1540 - Amethyst #1541 - Rhodochrosite *Plate number and position may vary from image shown.

United States #1549 10¢ Retarded Children Plate Block

United States #1506 10¢ Rural America - Kansas Hard Winter Wheat Plate Block