U.S. & Worldwide Stamps & Postal History
April 29-30, 2009
| Images | Description | Current Bid |
 | Lot #196 ARGENTINA 1917 20p dull blue & claret, center inverted, bottom left corner margin block of four, never hinged, centered to left as always, with 2005 Philatelic Foundation Certificate. This is the only known unhinged block of four of this popular invert  **Catalog #246a | Unsold |
