Machin Decimal Single Stamps
ACP/DEX (1p - 19p)
2p 3p 3½p 4p 5p
6p 10p 15½p  16p 17p
18p 19p

 1p

 
Ref Description Source

Price
 A10  1p head B1 crimson  cyl 12

  0.50
 A10a  very deep crimson  cyl 12   0.75
 A10b  experimental ACP - spotty  cyl 12  3.00
 A11  1p head B2  cyl 14  0.25
 A11ep  perf 15 x compound  p14/15 or p15/14   pair 3.00
 A11a lower value  cyl 15-17  0.30
 A11b  plum shade  cyl 17   0.75
 A11c  ex coil  horiz coil  0.35
 A11d  ex coil   vert coil  0.35
 A11e  ex s/t coil  13p RDA coil  3.25
 A11f  screen dots in value  13p RDA coil  0.60

 2p

 

  
Ref Description Source

Price
 A20             2p Myrtle green   T3 value    14p RDA coil                 0.75
 A21a            2p deep green   T3 value                 cyl 16             0.15
 A21b          screened value        cyl 16      0.25
 A21c                     left side imperf   PPPI      £1 DP174       0.50
 A21d                     right side imperf   PIPP      £1 DP174      0.50

3p
Ref Description Source

Price
 A30          3p head B2            cyl 43                 0.25
 A30a          3p   ex s/t pane 9              £4.00 R.Mint      2.50
 A30b            head B1                      cyl 38   0.25
 A30e       3p T3 thin value                 cyl 46                  0.25
 A30f           T3 thin value - sideways print          15p RDA coil                 0.90
3½p 
Ref Description Source

Price
 A35         3½p  purple brown                £4.00 R.Mint      1.25

4p
Ref Description Source

Price
 A40                       4p T1   pale blue green       13p/14p RDA     0.25
 A41a           T3  new blue   screened value                 15p RDA coil                  0.25
 A41b         T3  dull blue   screened value                 17p RDA coil                  0.25
 A41c                   T3  greeny blue   unscreened          18p RDA coil                 0.25
 A41d         T3 ofpp/d   new blue  unscr-d        19p RDA coil            0.30
 A41e           T2 value                cyl 15       0.20
 A41f           T2  translucent paper                 cyl 15                 0.80

5p

Ref Description Source

Price
 A50         5p  brown                 cyl 10     0.75
 A50a           screened value                 cyl 10                 0.50
 A50b          ex s/t coil           17p RDA coil                 0.40
 A50c              deeper shade                18p RDA coil                 0.25
 A50d                         5p ofpp/d 19p RDA coil   0.25

6p

Ref Description Source Price
 A60          6p  lime green                 cyl 11      0.30
 A60a                          deeper shade  late print cyl 11 (w865)      0.75
10p
Ref Description Source Price
 A100           10p  yellow orange              cyl 15-                  0.30
 A101          10p  orange brown               cyl 21                  0.30
15½p 
Ref Description Source Price
 A155                       15½p  cyl 3                 2.75

16p

Ref Description Source Price
 A160        16p  weak olive drab                cyl 2  (some)     0.90
 A160a        deeper shade                cyl 3/4        0.50
 A160ep      perf 15 x compound p14/15 or p15/14     pair    20.00
 A160b       ex pane 9        £4.00 R.Mint  0.60
17p
Ref Description Source Price
 A170        17p grey blue               cyl 10-15           0.50
 A170ep     perf 15 x compound     p14/15 or p15/14         pair   12.00
 A170a           grey shade                   cyl 13  2.75
 A170b        head D2 missing screen dot                 cyl 7                 1.50
 A170c                    ex prestige book                    panes 6/9  0.60
18p
Ref Description Source

Price
 A180         18p  olive  screen dots in value  cyl 4-5                 0.60
 A180ep      perf 15 x compound  p14/15 or p15/14           pair     4.00
 A180a         ex P & O book             pane 9       0.70
 A180b       ex pane 10         £1.80 DP92  0.65
 A180c         blackish olive                 £1.80 DP92         1.00
 A180d       thin value        £1.80 DP92       2.50
 A180e         ex pane 4, 10                 T2 window   0.75
 A180et   translucent paper T2 window 4.00
 A180f        ex coil                 vert coil                 0.90
19p
Ref Description Source

Price
 A190              19p orange              cyl 1-3   0.50
 A190a        ex pane 4, 10                   T2 window  1.00
 A190b       ex pane 10   £1.90 DP115      0.60
 A190c          ex coil          vert coil                 0.75
 A190d                   top imperf   IPPP      T3 window   0.80
 A190da                 bottom imperf   PPIP     T3 window   0.80
 A190d        top imperf   IPPP  s/w print          T3 window  2.00
 A190da      bottom imperf   PPIP  s/w print        T3 window   2.00
 A190db      top & right imperf   IIPP                   T3 window  7.00
 A190dc          bottom & right imperf   PIIP   T3 window   7.00
 A190e              APS perf - top imperf   IPPP T3 window   1.00
 A190ea       APS perf - bottom imperf PPIP                   T3 window   1.00