U.S. & Worldwide Stamps & Postal History; The David Mace Collection of U.S. Stamps
April 24-25, 2018
| Images | Description | Current Bid |
 | Lot #1620 VIETNAM 1957 Fourth World Trade Union Congress, 300d purple value tablet inverted in mirror print on the upper left stamp, in block of four with three normal stamps, unused without gum as issued, n.h., v.f. (Michel states only about 15 examples recorded, unpriced unused)  **Catalog #Mi.63K | Unsold |
