1855 Die 2 PL.12 MATCHED PAIR LETTERED AG S.C. 16 PRINTING (SG21) AND L.C. 14 (SPEC C6). Matched pair 1855 die 2 1d pl.12 lettered AG in the S.C.16 printing (SG21) with London "17" cancellation, several short perforations at foot, the L.C. 14 printing (Spec C6) fine used and the actual stamp illustrated in the Wiggins plating book. (Ref 96688).