GREAT BRITAIN 1880 1/- Orange Brown. Plate 13. Letters AOOA. Lovely circular postmark HAMILTON 20/12/80 which is probably unique

GREAT BRITAIN 1880 1/- Orange Brown. Plate 13. Letters AOOA. Lovely circular postmark HAMILTON 20/12/80 which is probably unique as the stamp was issued in 1881. Good perfs.