Robert A. Siegel Auction Galleries is one of the most prestigious and well-known philatelic auction houses in the world. Founded in 1930, it specializes in rare stamps and postal history, particularly from the United States. Over the decades, Siegel has handled some of the most valuable and historically significant collections, including those of William H. Gross and other prominent collectors. The auction house is known for its expertise, detailed research, and high-quality cataloging, making it a trusted name among stamp enthusiasts and investors.
Siegel Auctions frequently set record prices for rare stamps, such as the famous Inverted Jenny and 19th-century classics. They conduct both live and online auctions, providing global access to rare philatelic treasures. Their reputation for integrity and deep knowledge of the stamp market makes them a go-to destination for serious collectors worldwide.
On March 6th - 7th, 2025, there will be another auction dedicated to the US stamps. Here are some interesting lots deserving your attention: 
George Washinghton, 1851, 1c, blue stamp. An extraordinary used example with exceptionally large margins, showcasing the characteristic wide breaks in the outer lines at both the top and bottom. The stamp boasts a deep, rich color with a proof-like impression, complemented by a crisp blue circular datestamp cancel. One of the finest known examples of 1851. Estimated price: 11,000 USD
George Washinghton, 1851, reprint, 3c, orange brown stamps. A remarkable collection of over 870 used stamps housed in a stockbook, with numerous overlapping examples and some pairs. The majority bear handstamp cancels, with many in colored ink and some with pen cancels. However, many stamps are in sound and in very fine condition. Estimated price: 10,000 USD
Post Horse and Rider, 1869, re-issue, 2c, brown stamp. Original gum, displaying a rich, warm color with well-balanced margins and attractive centering. A scarce and desirable example. Most known examples of this variety are poorly centered, often with perforations cutting into the design on one side, making this well-centered stamp a particularly noteworthy find. Estimated price: 4,000 USD
George Washinghton, 1851, 3c, orange brown stamp. Original gum, featuring a massive right sheet margin and well-balanced ample margins on the remaining three sides. The stamp boasts a deep, rich color that enhances its visual appeal. Estimated price: 3,000 USD
Marilyn Monroe, 32c, part perforated, pane of 20 stamps. A striking Mint N.H. pane displaying a unique perforation anomaly—perforations run fully in the vertical direction up to the third vertical row and in the horizontal direction just beyond the start of the fourth vertical row. This item is a part of the Legends of Hollywood stamp series. Estimated price: 1,500 USD
