1916-31 Bi-coloured issues and subsequent surcharges, a study of the various printings comprising ½d. (58 mint; 13 used), 1d. (249 mint; 140 used), 1½d. (50 mint, four with "POSTACE" at right; 21 used), 2d. (57 mint; 21 used), 2½d. (18 mint; 2 used), 3d. (119 mint; 17 used), 4d. (7 mint; 10 used), 5d. (14 mint), 6d. (20 mint; 1 used), 1/- (14 mint; 4 used), 2/6d. (2 mint; 8 used), 5/- (1 mint; 5 used) and 10/- (1 mint; 1 used), 2d. on 1½d. (44 mint including two with "POSTACE" at right; 19 used including one with "POSTACE" at right), 5d. on 1/- (23 mint; 2 used), 9d. on 2/6d. (5 mint; 1 used), 1/3d. on 5/- (6 mint) and 1932 9d. (8 mint; 3 used) and 1/3d. (5 mint; 1 used). A good lot with many in multiples, some showing monogram or imprint. Generally fine. Cat. £2,800+