1854 DEVON/'DENBURY' UDC/PL.173 (AI) (SG8) STATE ONE/MISSING IMPRIMATUR LETTERING. Envelope Newton Abbot to Ashburton with four margined 1d pl.173 lettered AI in State I (filing crease affects) tied Newton Abbot "567" numeral. On reverse fine 'DENBURY' udc in blue and back stamped NEWTON ABBOT MR 3 1854 in yellow. MISSING IMPRIMATUR LETTERING. (Ref 76744).