2¢ Black (73), lightly cancelled by grid and affixed as intended over the window of unsealed Leeds & Franklin lattice window patent envelope, lattice work completely intact and unbroken, albino "Pat. June 19, 1860" below window, cover is addressed to Wells River, Vermont with "The Claremont Manufacturing Company, Book and Paper Manufacturers N.H." corner card, original enclosure a two-page circular advertising diary sales for 1865, fresh and Extremely Fine, an absolutely superb example of this rare patented envelope and especially desirable with the 2¢ Black Jack, the placement of the stamp nicely demonstrates the sender's understanding of the purpose of the envelope, which was to have the stamp and cancel or postmark become affixed to the enclosed letter when the letter was removed, but in this case the stamp did not stick through to the enclosure so it remains undisturbed on the lattice window, with 1994 P.F. certificate

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