Image #1
Lot # 630 | ** | Scott # C13 fn
| 1940, New York World's Fair, green overprint on 50a red brown, two singles, one of which has inverted overprint, full OG, NH, VF, 2,000 stamps were issued with a common overprint, and only 25 were produced with inverted one, made this stamp an undoubted worldwide airmail rarity, expertized by S. Wolf . |