1855 LEICS/"CLAYBROOK" UDC/Pl.13 (MK ML)(SPEC C6). Large envelope (222x93) used locally in Lutterworth with pair of die 2 pl.13 L.C.14 (Spec C6) lettered MK ML, both with perf faults, tied '483' numerals of Lutterworth. On reverse fine strike "CLAYBROOK" udc and LUTTERWORTH back stamp DE 28 55 both in green. (Ref 64909).