THE UNIQUE CANADA AND UNITED STATES FIRST ISSUES MIXED-FRANKING COVER WITH THE 1851 3-PENCE “BEAVER” AND A STRIP OF FIVE OF THE 5-CENT 1847 ISSUE -- LONG REGARDED AS ONE OF THE TOP FIVE MOST IMPORTANT COVERS OF THE UNITED STATES AND, BY VIRTUE OF ITS DUAL-COUNTRY FIRST ISSUE FRANKING, ONE OF THE MOST OUTSTANDING COVERS IN ALL OF CLASSIC WORLDWIDE PHILATELY.
USPCS census no. 310. Illustrated or discussed in Bakers’ U.S. Classics (p. 147), United States Postage Stamps of the 19th Century (Vol. I, noted on p. 25), “Covers with Three or More 1847 Stamps” (Chronicle 254, May 2017), Encyclopedia of British Empire Postage Stamps (Vol. V, noted on p. 150), Classic United States Imperforate Stamps (p. 12) and Alexander 1847 Census book (p. 34). Exhibited at World Stamp Show 2016 Court of Honor. Ex Rep. Ernest R. Ackerman, Henry C. Gibson, Ezra D. Cole, Philip G. Rust, Ryohei Ishikawa, Guido Craveri, Joseph Hackmey and William H. Gross. With 1993 P.F. certificate
Go to https://siegelauctions.com//2021/1239/518commentary.pdf for History and commentary on lot 518