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R. A. Siegel Auction Galleries

R. A. Siegel Auction Galleries

This auction house site offers an extensive online database of US stamp information. Includes PDF catalogs of past Siegel auctions, an encyclopedia of 19th-century issues (such as the 1845 New York Postmaster’s Provisional and the 1851 One-Cent Franklin), prices realized for various rare stamps, and images of a variety of interesting philatelic materials. A great deep dive on US stamp collecting!

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