Machin Decimal Single Stamps
ACP/DEX (20p - 50p)
22p 23p 24p 26p 27p
28p 29p 30p 31p 32p
33p 34p 35p 37p 39p
50p
20p
Ref Description Source

Price
 A200       20p  turquoise                 cyl 11                  0.40
 A201        20p  black          cyl 12              0.40
 A201a       screened value               cyl 12                 4.50
 A201b        ex coil               horiz coil                 0.60
 A201c        ex coil                 vert coil                  0.60
 A201d     20p   left side imperf   PPPI                 £1 DP133       1.25
 A201da       screen dots in value      £1 DP133      3.75
 A201e                    right side imperf   PIPP    £1 DP133       0.90
 A201ea        screen dots in value       £1 DP133      3.25
22p
Ref Description Source

Price
 A220             22p blue Experimental ACP.                cyl 3    2.50
 A220a         thin base to 22                 cyl 3                 7.50
 A221                22p  green              cyl 6 0.50
 A221ep      perf 15 x compound  p14/15 or p15/14     pair   30.00
 A221a                    screen dots in value    cyl 10                  1.20
 A222        22p  red                cyl 10                 0.50
 A222a         ex coil                 vert coil                 0.75
23p
Ref Description Source

Price
 A230  23p  green       cyl 6     0.70
24p
Ref Description Source

Price
 A240      24p  violet                cyl 2       1.50
 A240a                   screen dots in value     cyl 1                 1.25
 A240ep       perf 15 x compound  p14/15 or p15/14          pair      4.00
 A241        24p  red                cyl 2                  0.90
 A242              24p  chestnut - screened         cyl 1                  0.45
 A242a           no screen dots in value     cyl 1                 2.50
 A242b                       low OBA    screened   cyl 1  1.50
 A242c ex coil      vert coil  0.75
 A242d          ex s/t pane 4 -   s/w print      50p DP173      0.50
 A242e                left side imperf   PPPI      £1 DP174      0.70
 A242f                   right side imperf   PIPP     £1 DP174       0.70
26p
Ref Description Source

Price
 A260        26p  red                 cyl 1-2                  0.70
 A260a                 26p  T2  small value      1.04 window   3.00
 A260b                   screen dots in value      1.04 window    7.25
 A261             26p  drab                 cyl 4   0.70
27p
Ref Description Source

Price
 A270        27p  brown       cyl 1                 0.80
 A270a                    screen dots in value     cyl 1                  3.50
 A270b        ex 1.08 book        T2 window   2.25
 A270c                top imperf   IPPP      T3 window    4.25
 A270d                 bottom imperf   PPIP     T3 window   4.25
 A271 27p  violet              cyl 1       0.65
28p
Ref Description Source

Price
 A280        28p  violet             cyl 1         0.90
 A280ep    perf 15 x compound p14/15 or p15/14       pair    4.00
 A281       28p  ochre         cyl 4               0.70
 A282              28p  grey                 cyl 4   0.60
29p
Ref Description Source

Price
 A290      29p  purple                 cyl 4       1.40
30p
Ref Description Source Price
 A300        30p  olive   screened value       cyl 2                 0.75
 A300a              value not screened           cyl 2                 2.50
31p
Ref Description Source Price
 A310               31p  purple              cyl 2 1.00
 A310ep      perf 15 x compound  p14/15 or p15/14      pair    5.00
 A311a      31p  blue               cyl 8                 0.90
32p
Ref Description Source Price
 A320              32p  greenish blue   screened           cyl 1                 0.90
 A320a             value not screened            cyl 1                 5.25
33p
Ref Description Source Price
 A330             33p  emerald           cyl 1  0.75
 A330a        ex coil                vert coil                 1.25
34p 
Ref Description Source Price
 A340         34p  ochre                 cyl 2       1.00
 A340ep     perf 15 x compound  p14/15 or p15/14      pair      8.00
 A341a            34p  grey   screened           cyl 2                 1.00
 A342d    34p  mauve  screened                 cyl 2                 0.80
35p
Ref Description Source Price
 A350             35p  sepia  screened value cyl 1                  1.00
 A350               value not screened             cyl 1                  8.00
 A351       35p  yellow                     cyl 1  0.85
 A351a         very deep yellow                 cyl 1                  1.00
37p
Ref Description Source Price
 A370        37p  red                 cyl 2                 1.10
 A370a      screen dots in value  cyl 2             1.50
39p
Ref Description Source Price
 A390        39p  bright mauve               cyl 2                 1.00
 A390a         39p   screen dots in value   cyl 2                 2.00
 A390b         darker shade                 cyl 3/4     1.00
 A390c       ex coil                 vert coil                 1.00
50p
Ref Description Source Price
 A500       50p  ochre             cyl 36         1.25