Description
This collectible plate block of four 15-cent United States postage stamps was issued by the USPS to honor the successful landing of Viking I on the planet Mars.
Issue Date: July 20, 1978
City: Hampton, Virginia
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved
Perforations: 11
Color: Multicolored
Mint, never hinged condition.
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