Description
This collectible plate block of four 3-cent postage stamps was issued by the US Post Office to honor the Mount Palomar Observatory.
Issue Date: August 30, 1948
First City: Palomar Mountain, CA
Printed by: Bureau of Engraving and Printing
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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