1862, 1sh Green (SG 90). Used along with 1862 4p Vermilion (SG 81) and pair 1857 1p Rose Red (SG 40), tied by "466" (Liverpool) in oval grid on 1864 registered cover to James McMaster in New York (McMaster was editor of The New York Freeman's Journal), red oval Liverpool registry datestamp, "N. York Am. Pkt. Paid 36" arrival postmark
James Mc Master
Printing Dates
Plate 2 8th October 1862 - late 1864 Plate 3 16th June 1862 (not issued)
Wing margin stamps come from the center part of the sheet. In the pane shown above the left column of stamps have wing margins, There is no such thing as a straight edge perforated stamp in GB stamps.