1854 2d BLUE PL.4 S.C.16 (SG16)(AB) STATE 2 (SPEC F1h) AND 'DOUBLE PERFORATIONS' (SPEC F1e) VERY FINE USED. Very fine used 1854 2d blue pl.4 S.C.16 (SG19) lettered AB in STATE 2 (Spec F1h), also showing the rare variety 'DOUBLE PERFORATION' (Spec F1e), London cancellation. Rare exhibition item. (Ref 143985).