Lot   Cat.#
Net Price
171  C6-8
1931-32, Bleriot XI, imperforated proofs of triangle stamps, 10s-25s, complete set of four in tete-beche blocks of six, including two blocks of 10s with different positions of watermark Swastika, no gum as produced, NH, VF and very rare archival proofs

Stamp Auction #75, November 17, 2017. Raritan Stamp, Inc