Closed Auction

lot # 1594 - United States "Back of the Book" Stamps and Postal History

Tuesday Jun 16, 2020 09:00 to Wednesday Jun 17, 2020 16:00 America/Los_Angeles

MR8rP-a, 1910 1c Dark blue, Large die proof of Martha Washington only, sunken die proof of reply card indicia in center of glazed white cardstock (83 x 96mm), die sinkage 77 x 90.5mm, manuscript "July 7 1910" at bottom and blue BEP "431244" handstamp on reverse, Extremely Fine, one of two known, ex-Horton (Scott UY5rP; USPCC MR8rP-a, $1,000)