Proof "£10": 6d. with white numeral "No. 26. Duty, S.F. Blue. Head, D.F. Purple" with 1d. "No. 53. Border, S.F. Blue. Head, D.F. Purple" and £10 "No. 60. Border, S.F. Blue. Head, D.F. Purple"; the piece with printed "X" at left. Photo