United States Stamps Featuring the "Nelson" Collection & The Dr. Larry C. Parks Collection of United States Postal Stationery

1R-4R, 1931 RPS Reprints of the 1861 1d-1sh First Issue, complete set of the four values in full black «proof» sheets of 12 pulled from the original steel plates; the 4d plate was de-faced prior to printing, the others being de-faced afterward; each of the four is serially numbered «31», Very Fine and choice, just 50 sets produced; the 1sh plate clearly shows the «crossed lines on the hill» variety at position 9; the original plates are on permanent display at the Royal Philatelic SocietySale 3054: Session 1 - British Commonwealth Stamps and Covers