U.S. Possessions; Canal Zone, Post Office Seal, 1917, Dark Blue, Watermarked, Complete Sheet of 25, #OX3a, ungummed, scarce multiple, Fine to Very Fine. Scott $875 ++. Estimate $300-400.
Harmer-Schau Auction Galleries, Inc. 1333 North McDowell Blvd., Suite B • Petaluma, California 94954
Tel: 707-778-6454 • Fax: 707-763-6772 • Toll Free 800-378-6454
E-mail: info@harmerschau.com
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