U.S. and Worldwide Stamps; South America; Russia
January 13-14, 2010
| Images | Description | Current Bid |
 | Lot #839 MEXICO Air Post 1975 Leon Guzman and Ignacio Ramirez, 60c yellow green, block of four, n.h. and post office fresh, a major 20th Century rarity, only 80 copies believed to exist (two sheets of 50 were discovered, of which 20 were defective), one of only a few known blocks (catalogue value for singles)  **Catalog #C471A Catalog Value $4,800 | Unsold |
