U.S. and Worldwide Stamps; South America; Russia
January 13-14, 2010
| Images | Description | Current Bid |
 | Lot #2427 MEXICO Air Post 1935 20c lake, overprinted "Amelia Earhart Vuelo de Buena Voluntad Mexico 1935", with additional "Muestra" at bottom, upper right sheet corner margin block of four, n.h., v.f., with 1956 Philatelic Foundation Certificate, ex-George Sloane collection. Only 350 stamps were overprinted "Muestra", making it scarcer than the issued stamp. As far as we know, this is the only known block of four  **Catalog #C74S | Price Realized $8,500.00 |
