MADELEINE SMITH EXPERIMENTAL DUPLEX IN GREEN/PL.16 (GC)(SPEC.C6). Small piece with good used die 2 1d pl.16 L.C.14 (Spec C6) lettered GC, centred to lower left, tied good strike of this experimental cancellation MY 9 1856 in GREEN (Spec.C1vc Cat. £550). Cancellation in state one and examples in green are only recorded first two weeks of May 1856. very scarce. (Ref 90512).