U.S. #2508-11
25¢ Creatures of the Sea

Issue Date: October 3, 1990
City: Baltimore, MD
Quantity: 69,566,000
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed and engraved
Perforations: 11
Color: Multicolored

This block of 40 was a joint issue between the U.S Postal Service and the
Soviet Union’s Ministry of Posts. The issue focused worldwide attention on
marine mammals inhabiting the earth’s oceans. The historic issue is a shining
example of the U.S. and the Soviet Union working together for the world’s
common good.