U.S.; Airmail, 1988, 36¢ Sikorsky, Red, Dark Blue & Black (Engraved) Omitted, Block of 4, #C119a, n.h., Very Fine to Extremely Fine and rare, 2016 P.S.E. cert. Scott $7,600. Estimate $1,800-2,200.
Harmer-Schau Auction Galleries, Inc. 1333 North McDowell Blvd., Suite B • Petaluma, California 94954
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