This collectible plate block of four 3-cent postage stamps was issued by the US Post Office to honor the American Chemical Society.
Issue Date: September 4, 1951
First City: New York, NY
Printed by: Bureau of Engraving and Printing
Printing Method: Rotary Press
Perforations: 11 x 10½
Color: Violet brown
Mint, never hinged condition.
We often have multiple copies of this item in stock; the plate number and/or position may vary.
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