U.S. and Worldwide Stamps & Postal History; July 15, 2015: The Confino Collection of United States
July 8-9, 2015
| Images | Description | Current Bid |
 | Lot #147 ARGENTINA 1917 San Martin, 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. Only 50 issued, all off-centered (Kneitchel No.312a "todos los ejemplares de esta hojo unica son descentrados"). This is the only known unhinged sheet corner margin block of four of this popular invert (catalogue value for hinged singles),  **Catalog #246a Catalog Value $ 6,000 | Price Realized $6,250.00 |
