1891, surcharges 20 c. on 3 c., 50 c. on 48 c. and 1 $. on 96 c., all with “SPECIMEN” overprint, unused with original gum, 20 c. one missing perf and small spot between “I” and “M”, not further affecting the appearance, otherwise fine and fresh (Yang Nr. 42-44, HK$ 6000,- for MNH)