1846 BERKS/'WALLINGFORD PENNY POST' (BR420). Letter Dorchester (on Thames) Oxon to Bicester dated May 15th 1846, postage paid in cash with good to fine strike "Wallingford/Penny Post" hand stamp in black (BR420) used 4 years after Co. cat records. WALLINGFORD date stamp MY 15 1846. (Ref 81203).