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WORLDWIDE AIR POST STAMPS AND POSTAL HISTORY
United States
Lot # 3 | ** | Scott # C125b
| 1989, 20th UPU Congress, Futuristic Mail Delivery, (45c) multicolored, bottom sheet margin (USPS) se-tenant block of four with light blue (engraved) color omitted (country name and denomination), full OG, NH, VF, C.v. $500, Est. $150-$200 . |