This mint stamp was issued by the United States on August 15, 1957, to commemorate the 350th anniversary of shipbuilding in America. The stamp design depicts the Virginia of Sagadahock, the first American-built ship to participate in world commerce. The design also includes the state seal of Maine.

The above image is an enlargement (scanned at 125% of actual size); the actual size of this stamp is 28 x 26 mm.