Image #1
WORLDWIDE AIR POST STAMPS AND POSTAL HISTORY
UNITED STATES
Lot #
18 | 
| Scott # UC19a
| 1951, DC-4 Skymaster, inverted "REVALUED 6c P.O. DEPT." on stationery envelope 5c red, very fresh, unused and VF. This error is listed but priced with "-" in the Cat., Est. $800-$1,000 . |