United States #1476 8¢ Pamphlet Printing Plate Block
*Plate number and position may vary from image shown.
1973 8¢ Pamphlet Printing Plate Block
$1.75
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1973 8¢ Progress in Electronics - Transistors & Printed Circuits Plate Block
United States #1501 8¢ Progress in Electronics - Transistors & Printed Circuits Plate Block
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