1924-26 Block Cypher
Booklets, panes invalidated with 'SPECIMEN' Type 23 (Harvey) [L] 61(4)77
Controls, constant varieties (Mark) [N] 35(1)20, (Jones) [N] 35(2)40
Experimental paper (Moorcroft) [L] 37(6)112
Mysterious lines on the back (Skelly) [M] 29(5)82, (Mark) [S] 30(2)30
Perforation, missing pins (Price) [M] 28(1)6, (Paul) [N] 28(3)63, (Jones) [S] 29(2)40
Provisional printings, 1934 (Blackstock) [L] 58(3)49, (Escott) [M] 58(4)94
Waterlow provisional printing (Wilkinson) [N] 22(1)11, (Wilkinson) [N] 23(4)50
½d
Double print, control block of 6 (illustration) (SWL90) [N] 28(2)44
Variety, Plate 49, plate cracks (Wlodarczyk) [M] 55(5)109
— R?/12, spot on eyebrow (Wilkinson) [N] 32(5)86
— break below LF of HALFPENNY (Wilkinson) [N] 27(2)40
Waterlow provisional printing, Perf. C (Wilkinson) [N] 22(4)64
Watermark, inverted with perforation Type 3A and Control A24 (Wlodarczyk) [M] 55(5)109
— sideways‑inverted (Bellew) [N] 37(2)38
1d
CANCELLED Type 28 overprint (Candlish) [N] 29(3)42
Control D 25, two positions of (Jackson) [S] 39(2)35
Double print (Mark) [N] 25(4)80
Perf. Type 2c on Control B 24 (Bainbridge) [N] 39(5)99
Plate 19, Control M 30 (Bainbridge) [N] 39(5)99
Roll wrapper, unrecorded, Kermode 1000 (Jackson) [N] 26(1)18
Variety, Control F 26, R20/7, broken inner frame lines at left (Mark) [N] 24(3)40
— Plate 7, Control E 26, R20/12, gash in left of crown (Wilkinson) [S] 23(6)83
— — — — gash in left of crown, SG Spec. N34f (Mark) [N] 24(3)40
— Plate 16, Control M 30, R20/11, dot behind ear (Bainbridge) [N] 39(5)99
— R?/11, coloured mark on bridge of nose (Mark) [N] 24(3)40
Watermark, sideways, on booklet pane (Jackson) [N] 30(2)32
Wattses underprints (Pusterla) [S] 54(2)48
1½d
Circular flaw (Brooks) [N] 32(2)31
KGV 1½d (based on a display to the GBPS on 21 November 1992) (Jones) [L] 31(2)37
Perforation (Jones) [S] 31(2)38
— Type 3A with Control F26 (Wlodarczyk) [M] 55(5)109
Plate 56, Control E26, plate markings; and markings in top‑left corner of sheet (Bainbridge) [S] 57(4)96
Plate markings, unlisted (Wlodarczyk) [M] 55(5)109
Printed on the gummed side (Jones) [S] 31(2)39
Shades, measurement of (Currie) [M] 38(6)105
Variety, Control M 30, R20/2, coloured speck under E of THREE (Jackson) [N] 26(1)18
— Control S 33, R20/1 (Wilkinson) [N] 22(4)64
— — R20/2, broken left frame opposite tablet (Wilkinson) [N] 32(5)86
— Plate 3, SG Spec. N35p repaired (Bainbridge) [M] 56(6)134
— Plate 50, R1/12, breaks in cross on crown (Jones) [S] 34(4)80
— booklet stamp, No. 1, blot below C (Wilkinson) [N] 30(1)19
— — No. 5, printing flaw (Jackson) [N] 26(1)18
— — R2/1, white spot on left scroll (Bainbridge) [S] 48(1)6
— distorted E (Wilkinson) [N] 32(5)86
— moustache flaw (Wilkinson) [N] 32(5)86
Watermarks (Jones) [S] 31(2)38
2d
Date, earliest used (Kaiserman) [N] 34(6)117
Frame break on roll stamp (Alexander) [N] 21(1)13
Variety, Waterlow Plate 17, R19/2, frame break below 'O' of 'TWO' (Durston) [S] 59(3)55
— — R20/2, frame break below 'N' of 'PENCE' (Bainbridge) [S] 59(2)27, (Durston) [S] 59(3)55
4d
Plating and controls (Kinabrew) [S] 27(4)69
5d
Controls and plates (Kinabrew) [M] 26(5)82
6d
Controls and plates (Kinabrew) [M] 23(1)3, (Kinabrew) [M] 26(5)82
Plate 8, plate marking and controls (Bainbridge) [M] 50(6)131
Plate 9, plate marking and controls (Bainbridge) [M] 50(6)131
Plate marking, unrecorded (Jackson) [N] 26(1)18
Plates used (Jackson) [S] 51(1)24
Variety, bar of A in POSTAGE missing (Wilkinson) [N] 32(5)86
— frame break above REVENUE (Wilkinson) [N] 32(5)86
Watermarks, inverted, Control M.30 (Mark) [N] 24(3)40
9d
Controls and plates (Kinabrew) [M] 26(5)82
10d
Controls and plates (Kinabrew) [M] 26(5)83
Variety, break in lower frame (Kaiserman) [S] 51(6)138
— frame breaks on adjacent stamps, SG Spec. N44b/ba (Mark) [N] 24(3)40
1s
Controls and plates (Kinabrew) [M] 26(5)83
Waterlow provisional printing, Perf. B (Wilkinson) [N] 22(4)64