1933 United States Post Office Airmail Stamp
Updated August 10, 2026
| Lot number | 1s |
| Category | Stamps & Philately |
| Auction | THU COIN STAMP & SPORTS CARD AUCTION SILVER ERRORS |
| Date | August 13, 2026 at 7:00 PM CDT |
| Auction house | Tyler Grace Auctions |
| Location | Addison, Texas |
United States 1933 50¢ airmail stamp identified as Scott C18, “A Century of Progress Flight,†depicting a Graf Zeppelin above exposition-related imagery. Includes the associated white identification/display card marked “US # C18†and “1933AIR.†Green perforated stamp shown under an apparent transparent covering or sleeve; glare and age-related yellowing are visible. The reverse is not shown, so gum, hinge status, watermark, cancellation, and back condition cannot be assessed.Originality versus reproduction and Zeppelin-flight usage are not established; the stamp is not accompanied by a flown cover. The display card bears partially illegible handwritten notes and unfilled catalog/price fields.
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