PL.29 (SG8)(SL VARIETY 'SQUAT S' SPEC BS18b)/LONDON NO. '6' IN MALTESE CROSS (SPEC B1uf)/MISSING IMPRIMATUR LETTERING. Good to fine used 1842 1d pl.29 (SG8) lettered SL with four close but clear to large margins and cancelled good upright strike London no. '6' in Maltese Cross. Cancellation clear of the excellent constant variety 'SQUAT S' (spec BS18b). MISSING IMPRIMATUR LETTERING. (Ref 120284).