1857 Transatlantic mail. An envelope bearing a 1s Pale green tied by a crisp Enniskillen "214" spoon cancellation for JY.21.1857. with red "PAID" and "5 Cents" handstamps. Backstamped for JY.22-23.1857.
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.