1820 DORSET/"BLANDFORD 106" MILEAGE MARK (DT43). Fine entire family letter Ibberton to Marston Magna Sherborne Dorset dated Feb 14 1820, postage paid and on front fine strike "BLANDFORD/106" mileage mark in black (DT43) used 2 years earlier than county cat. records. (Ref 111670).