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Great Britain Machins

These Great Britain Machins were acquired from an estate in 2025. Over a 25-year period, the collector purchased these items from B. Alan Ltd., a well-known dealer in the UK for 50 years. The owner, James Skinner, was also editor of the Connoisseur Catalogue of Machin Stamps, the "go to" Machins catalogue for many years.

This collection is being parsed and released for sale throughout 2026. This first group consists of over 150 Machin errors and varieties all in unmounted mint condition. Many of these stamps are very rare  and unavailable for purchase elsewhere. This includes:

  • Several imperf pairs including a 2p Green in a block of 6, and a 24p Terracotta in a block of 6
  • A selection of perforation shifts and offsets
  • Many Castle perforation shifts
  • A few booklets and booklet panes

The rarest item is a partial Beatrix Potter booklet pane, with phosphor omitted on the 8p, 33p, 39p, and 2nd. There's also a full pane available with a phosphor wash, and sporadic phosphor on all the stamps.

Provenance, in the form of the original invoice or price list from B. Alan Ltd. describing the item, will assist buyers in authentication. These are identified in the item description.

Pricing is shown in Canadian dollars but you can change the currency located in the top bar of the page to Pound Sterling, Euro or United States Dollar.

Free shipping worldwide with tracking is included with any order.

 
£2 Castle Pale Indigo The Complete Machin Catalogue number TCM HV3a. This item was part of a large estate of Machin stamps. It was originally purcha..
CA$165.00
£5 Castle Minor Perf Shift Minor shift downward causing one perf hole missing at the top..
CA$45.00
2nd (1998) Missing Blue Colour - see details in attachments The Complete Machin Catalogue number TCM NV36x. This item was part of a large estate of ..
CA$205.00
2nd Bright Blue CB (1998) Walsall Horiz. Imperf Pair (6mm gap) The Complete Machin Catalogue number TCM NV36u. This item was part of a large estate ..
CA$255.00
2nd Bright Blue CB (1998) Walsall Horiz. Imperf Pair (4mm gap) The Complete Machin Catalogue number TCM NV36v. This item was part of a large estate ..
CA$230.00
2nd Bright Blue CB (1998) Walsall Vert. Imperf Pair (4mm gap) The Complete Machin Catalogue number TCM NV36v. . This item was part of a large estate ..
CA$230.00
2nd Deep Blue CB (1990) Questa Phosphor Omitted and Perf Shift The Complete Machin Catalogue number TCM NV13. This item was part of a large estate o..
CA$140.00
£2 Castle Bright Blue Colour Gutter Block The Complete Machin Catalogue number TCM HV7a. This item was part of a large estate of Machin stamps. It w..
CA$460.00
£2 Castle Offset Block Blue outlines offset This item was part of a large estate of Machin stamps. It was originally purchased from B. Alan Ltd., a w..
CA$46.00
£5 Castle Queen's Portrait Colour Error Gutter Pair..
CA$140.00
£5 Castle Offset Queen's head offset..
CA$140.00
£10 Britannia Major Perf Shift - Block Selvedge is separated from upper left stamp..
CA$460.00
2nd Bright Blue (1993) Questa Phosphor Omitted The Complete Machin Catalogue number TCM N29i. This item was part of a large estate of Machin stamps...
CA$160.00
1st Orange-red 2B (1993) CB Only The Complete Machin Catalogue number TCM NV30m. Normally 2B. CB only, right of centre. This item was part of a larg..
CA$195.00
1st Orange-red 2B (2000) Questa Imperf Pair (4mm gap) The Complete Machin Catalogue number TCM NV37f. This item was part of a large estate of Machin..
CA$90.00
1st Orange-red 2B (2000) Questa Major Perf Shift The Complete Machin Catalogue number TCM N37v. This item was part of a large estate of Machin stamp..
CA$85.00
1st Orange-red 2B (1993) Split Right Band The Complete Machin Catalogue number TCM NV30n. This item was part of a large estate of Machin stamps. It w..
CA$40.00
1st Orange-red 2B (1993) Walsall Three Band Variety Left stamp has two bands, 1mm apart..
CA$115.00
1st Orange-red (1998) Walsall Vert. Imperf Pair (4mm gap) The Complete Machin Catalogue number TCM NV37f. This item was part of a large estate of Ma..
CA$230.00
1st Orange-Red 2B (1993) Walsall Phosphor Omitted The Complete Machin Catalogue number TCM NV30p. This item was part of a large estate of Machin sta..
CA$185.00
1st Orange-red 2B (1993) Walsall Phosphor Omitted The Complete Machin Catalogue number TCM NV33c. This item was part of a large estate of Machin sta..
CA$240.00
4d Vermilion (1969) Major Perf Error Perf error caused by paper fold..
CA$460.00
5d Royal Blue 2B (1968) Imperf Block The Complete Machin Catalogue number TCM PD15j...
CA$155.00
5d Royal Blue 2B (1968) Imperf Pair The Complete Machin Catalogue number TCM PD15j...
CA$80.00
5d Royal Blue 2B (1968) Téte-béche Pair The Complete Machin Catalogue number TCM PD15i...
CA$300.00
5d Deep Blue 2B (1969) Perf Shift Block The Complete Machin Catalogue number TCM PD16b. ...
CA$55.00
£1 Black Imperf Pair The Complete Machin Catalogue number TCM LF8a...
CA$115.00
Wedgewood Booklet Pane (1972) Phosphor on Back Phosphor omitted on front and printed on back. TCM catalogue numbers NE13p|NE15b|NE18v..
CA$860.00
Alias Agatha Christie Booklet (1991) Missing Interleaf Missing the "Man in the Brown Suit" interleaf between panes 2 and 3..
CA$70.00
Alias Agatha Christie Booklet (1991) Multiple Strike Interleaf between panes 1 and 2 show multiple strikes of the perforated "Stamp"..
CA$90.00
Alias Agatha Christie Booklet (1991) Interleaf Position Error "The Mousetrap" interleaf appears after pane 4, not before..
CA$70.00
Alias Agatha Christie Booklet Pane (1991) Rhouletting Missing Rouletting missing between stamps and selvedge...
CA$140.00
Beatrix Potter Booklet Pane Phosphor Wash Phosphor wash across the entire booklet pane and phosphor missing or sporadic on the stamps themselves..
CA$1,840.00
Booklet Pane 39p Double Printed The Complete Machin Catalogue number TCM NE209d. The pane 39p's are double printed, most noticeable around the value ..
CA$690.00
Cymru Wales Prestige Booklet (1992) Back Cover Inverted & Miscut..
CA$100.00
Booklet (1989) Phosphor Omitted The Complete Machin Catalogue number TCM CB56a. This item was part of a large estate of Machin stamps. It was original..
CA$550.00
2nd Bright Blue (1993) Questa Phosphor Omitted Booklet The Complete Machin Catalogue number TCM NV29i. This item was part of a large estate of Mach..
CA$1,610.00
£1.50 Harrison Trial Booklet - 15p Double Head The pane is printed on perforated, gummed paper by a phosphor cylinder in maroon. This was used as a t..
CA$230.00
2p Green Cylinder (1986) Block of 25 Printing Flaw The Complete Machin Catalogue number TCM NE184a...
CA$230.00
17p Deep Blue CB (1991) Phosphor Omitted The Complete Machin Catalogue number TCM NE194a. This item was part of a large estate of Machin stamps. It ..
CA$220.00
18p, 33p, 39p, 2nd (1993) Phosphor Omitted Part Booklet Pane TCM cataloge numbers NE198c | NE207c | NE209e | NV9b..
CA$2,785.00
33p Light Emerald 2B (1992) Phosphor Omitted The Complete Machin Catalogue number TCM NE207c. This item was part of a large estate of Machin stamps...
CA$690.00
1/2p Turquoise FCP 2B (1971) All Over Phosphor The Complete Machin Catalogue number TCM NE1j. This item was part of a large estate of Machin stamps...
CA$90.00
1/2p Turquoise FCP 2B (1971) POTS Specimen Post Office Training Stamp (POTS). Trimmed perfs at bottom. This item was part of a large estate of Machi..
CA$690.00
1/2p Turquoise FCP 2B (1971) Strip Imperf and Blind Perfs The Complete Machin Catalogue number TCM NE1zu. This item was part of a large estate of Ma..
CA$4,485.00
1p Crimson FCP (1971) Imperf / Blind Perf Strip The Complete Machin Catalogue number TCM NE4zn. This item was part of a large estate of Machin stamp..
CA$2,945.00
1p Crimson FCP CB (1977) Phosphor Omitted and Imperf Left The Complete Machin Catalogue number TCM NE5k. This item was part of a large estate of Mac..
CA$55.00
50p Mount Stewart Booklet Phosphor Omitted The Complete Machin Catalogue number TCM CB47a. This item was part of a large estate of Machin stamps. It..
CA$225.00
1 1/2p Black 2B (1971) Major Perf Shift Block The Complete Machin Catalogue number TCM NE10g...
CA$920.00
1 1/2p Black 2B (1971) Major Perf Shift Strip The Complete Machin Catalogue number TCM NE10g...
CA$460.00
2p Green FCP 2B (1971) Imperf and Blind Perf Block The Complete Machin Catalogue number TCM NE11zq. Block of 6 with top two stamps imperf on left, ..
CA$2,990.00
2 1/2p Magenta FCP CB (1971) Perf Shift The Complete Machin Catalogue number TCM NE13. This item was part of a large estate of Machin stamps. It was..
CA$70.00
2 1/2p Magenta FCP CB (1971) POTS Specimen Post Office Training Stamp (POTS). Trimmed perfs at top. This item was part of a large estate of Machin s..
CA$920.00
2 1/2p Magenta FCP CB (1971) Imperf Pair The Complete Machin Catalogue number TCM NE13zi...
CA$345.00
3p Ultramarine FCP 2B (1971) POTS Specimen Post Office Training Stamp (POTS). Trimmed perfs at top. This item was part of a large estate of Machin s..
CA$460.00
3p Ultramarine FCP 2B (1973) Imperf Pair The Complete Machin Catalogue number TCM NE18zv...
CA$370.00
3p Ultramarine FCP CB (1973) Band Displaced The Complete Machin Catalogue number TCM NE19e. This item was part of a large estate of Machin stamps. I..
CA$550.00
3p Ultramarine FCP CB (1973) Imperf Pair The Complete Machin Catalogue number TCM N19j...
CA$370.00
5p Claret FCP CB (1985) Phosphor Omitted and Imperf Left The Complete Machin Catalogue number TCM NE33b. This item was part of a large estate of Mac..
CA$80.00
4 1/2p Grey-blue FCP 2B (1973) Imperf Pair The Complete Machin Catalogue number TCM NE31g...
CA$485.00
6 1/2p Greenish-blue FCP CB (1975) Displaced Band The Complete Machin Catalogue number TCM NE35b. From cylinder 4 with CB band displaced and becomi..
CA$275.00
6 1/2p Greenish-blue FCP CB (1975) Imperf Pair The Complete Machin Catalogue number TCM NE38k. This item was part of a large estate of Machin stamp..
CA$415.00
7p Purple-brown FCP 2B (1975) Imperf Pair The Complete Machin Catalogue number TCM NE41f...
CA$1,105.00
7p Purple-brown FCP CB (1977) Imperf Block The Complete Machin Catalogue number TCM NE42n...
CA$260.00
7p Purple-brown FCP CB (1975) Imperf Top The Complete Machin Catalogue number TCM NE42p...
CA$150.00
8p Red FCP CB (1979) Perf Shift Block The Complete Machin Catalogue number TCM NE47g...
CA$330.00
8p Red FCP (1979) CB Imperf Pair The Complete Machin Catalogue number TCM NE47m...
CA$1,290.00
8p Red FCP CB (1979) Enschedé Phosphor Omitted The Complete Machin Catalogue number TCM NE47l...
CA$205.00
8 1/2p Light Yellow-Green FCP 2B (1976) Imperf Pair The Complete Machin Catalogue number TCM NE51j...
CA$1,565.00
9p Deep-violet FCP 2B (1976) Imperf Pair The Complete Machin Catalogue number TCM N53l...
CA$320.00
10p Orange-brown and Chestnut FCP 2B (1971) Orange-brown Omitted Block The Complete Machin Catalogue number TCM NE55f...
CA$735.00
10p Orange-Brown FCP CB (1980) Perf Shift Margin Pair The Complete Machin Catalogue number TCM NE60e. This item was part of a large estate of Machin..
CA$140.00
10p Orange-Brown FCP CB (1980) Imperf Pair The Complete Machin Catalogue number TCM NE60l...
CA$345.00
11 1/2p Drab FCP CB (1981) Imperf Pair The Complete Machin Catalogue number TCM N66F...
CA$315.00
12p Yellow-green FCP 2B (1980) Phosphor Front and Back The Complete Machin Catalogue number TCM NE69d. This item was part of a large estate of Mach..
CA$90.00
12 1/2p Light Emerald FCP CB (1982) Imperf & Blind Perf Strip The Complete Machin Catalogue number TCM NE33v. Top 2 stamps imperf, bottom 3 stamps ..
CA$275.00
13p Pale Chestnut FCP CB (1984) Phosphor Omitted and Imperf Right The Complete Machin Catalogue number TCM NE76q. This item was part of a large esta..
CA$25.00
13p Pale Chestnut FCP CB (1984) Imperf Pair The Complete Machin Catalogue number TCM NE76n. This item was part of a large estate of Machin stamps. I..
CA$715.00
13p/17p Strip FCP (1984) Phosphor Front and Back TCM Catalogue Numbers NE77c | NE87j | NE78b..
CA$460.00
14p Deep Blue FCP CB (1988) Perf Shift Block The Complete Machin Catalogue number TCM NE80k...
CA$440.00
14p Deep Blue FCP CB (1988) Perf Shift Block The Complete Machin Catalogue number TCM NE80k...
CA$330.00
14p Deep Blue FCP CB (1988) Imperf Pair The Complete Machin Catalogue number TCM NE80v...
CA$460.00
17p Deep Blue FCP CB (1990) Imperf Pair The Complete Machin Catalogue number TCM NE88f. This item was part of a large estate of Machin stamps. It wa..
CA$1,565.00
18p Bright Green FCP CB (1991) Phosphor Omitted and Imperf Pair The Complete Machin Catalogue number TCM NE92g. This item was part of a large estate..
CA$485.00
18p Bright Green FCP CB (1991) Phosphor Omitted Coil Single The Complete Machin Catalogue number TCM 92f. This item was part of a large estate of Ma..
CA$30.00
18p Bright Green FCP CB (1991) Phosphor Omitted Coil Strip The Complete Machin Catalogue number TCM 92f. This item was part of a large estate of Mac..
CA$140.00
1/2p Turquoise PCP (1980) Imperf Pair The Complete Machin Catalogue number TCM N103d...
CA$140.00
2p Green PCP (1979) Imperf Pair The Complete Machin Catalogue number TCM NE105c...
CA$2,760.00
3p Bright Magenta ACP (1989) Major Perf Shift The Complete Machin Catalogue number TCM NE110c. This item was part of a large estate of Machin stamps..
CA$85.00
4p New Blue ACP (1988) Imperf Pair The Complete Machin Catalogue number TCM NE114d. This item was part of a large estate of Machin stamps. It was or..
CA$2,760.00
15p Bright Blue FCP CB (1989) Phosphor Omitted and Imperf Pair The Complete Machin Catalogue number TCM NE82c. Stamp on the left has a natural, lig..
CA$575.00
16p Drab ACP (1983) Imperf Pair The Complete Machin Catalogue number TCM NE130j...
CA$185.00
17p Grey-blue ACP (1984) Imper Pair The Complete Machin Catalogue number TCM NE133h...
CA$370.00
18p Deep Oive-green ACP (1984) Imperf Pair The Complete Machin Catalogue number TCM NE136f...
CA$140.00
19p Bright Orange-red ACP (1988) Perf Shift The Complete Machin Catalogue number TCM NE137. This item was part of a large estate of Machin stamps. I..
CA$70.00
19p Bright Orange-red ACP (1988) Imperf Pair The Complete Machin Catalogue number TCM NE137f...
CA$460.00
20p Black ACP (1989) Strip with Imperf Pair The Complete Machin Catalogue number TCM NE141g. This item was part of a large estate of Machin stamps. It..
CA$1,240.00
22p Blue PCP2 (1980) Phosphor Omitted The Complete Machin Catalogue number TCM NE143e...
CA$505.00
22p Bright Orange-red ACP (1990) Imperf Pair The Complete Machin Catalogue number TCM NE145d. This item was part of a large estate of Machin stamps...
CA$805.00
24p Terracotta ACP (1989) Imperf Pair and Blind Perfs Margin Block of 6 The Complete Machin Catalogue number TCM NE149b. Block of 6 with top two st..
CA$3,680.00
24p Chestnut ACP (1991) Imperf Pair The Complete Machin Catalogue number TCM NE150e. This item was part of a large estate of Machin stamps. It was o..
CA$260.00
26p Red ACP (1982) Imperf Pair The Complete Machin Catalogue number TCM NE153b. This item was part of a large estate of Machin stamps. It was origin..
CA$895.00
50p Ochre-brown OCP (1980) Imperf Pair The Complete Machin Catalogue number TCM NE176h. This item was part of a large estate of Machin stamps. It wa..
CA$805.00
50p Ochre ACP (1992) Imperf Pair cyl. 36 The Complete Machin Catalogue number TCM NE175a. This item was part of a large estate of Machin stamps. It ..
CA$2,390.00
6p Yellow-olive 2B (1993) Enschedé Phosphor Omitted The Complete Machin Catalogue number TCM E6d. This item was part of a large estate of Machin sta..
CA$165.00
7p Magenta 2B (2004) De La Rue Imperf Pair The Complete Machin Catalogue number TCM E9b. This item was part of a large estate of Machin stamps. It w..
CA$230.00
19p Olive-green CB (1993) Harrison Imperf Pair The Complete Machin Catalogue number TCM E20u. This item was part of a large estate of Machin stamps...
CA$485.00
19p Olive-Green CB (1999) Harrison Phosphor Omitted The Complete Machin Catalogue number TCM E20t. This item was part of a large estate of Machin st..
CA$115.00
20p Bright Green 2B (2003) De La Rue Phosphor Wash The Complete Machin Catalogue number TCM E25g. This item was part of a large estate of Machin sta..
CA$80.00
20p Bright Green (2003) De La Rue Imperf Pair The Complete Machin Catalogue number TCM E25i. This item was part of a large estate of Machin stamps. ..
CA$330.00
25p Rose-red 2B (1993) Harrison Imperf Strip with Yellow Phosphor The Complete Machin Catalogue number TCM E28. Horizontal strip of 3 with the left..
CA$1,380.00
25p Rose-red PCP (1993) Imperf Pair The Complete Machin Catalogue number TCM E27c. This item was part of a large estate of Machin stamps. It was ori..
CA$805.00
38p Red 2B (1993) Enschedé Imperf Pair The Complete Machin Catalogue number TCM E45b. This item was part of a large estate of Machin stamps. It was ..
CA$330.00
19p Oive-green CB (1995) Perf Shift Block The Complete Machin Catalogue number TCM E20f. This item was part of a large estate of Machin stamps. It w..
CA$165.60
Selvedge Imperf on Pane 3 Selvedge on pane 3 is imporforate. Stamps are correctly perforated...
CA$90.00
24p Chestnut 2B (1991) Longwave Phosphor (Doubled) Both stamps have 2B double printed, most visible on the band at the left of the stamp. For the sta..
CA$230.00
5 1/2p Violet 2B (1974) Normal and Double Print Normal (left) and Double Print (right). Most noticable around the number...
CA$115.00
5 1/2p Violet CB (1975) Imperf and Blind Perf Block The Complete Machin Catalogue number TCM SC9a...
CA$920.00
20p Bright Green CB (1996) Perf Shift Margin Pair The Complete Machin Catalogue number TCM SC73a. This item was part of a large estate of Machin sta..
CA$230.00
20p Bright Green CB (1996) Perf Shift The Complete Machin Catalogue number TCM SC73a. This item was part of a large estate of Machin stamps. It was ..
CA$115.00
8p Red 2B (1974) Phosphor Omitted The Complete Machin Catalogue number TCM WA13b. This item was part of a large estate of Machin stamps. It was orig..
CA$780.00
18p Bright Green (1991) All Over Phosphor The Complete Machin Catalogue number TCM WA38d. This item was part of a large estate of Machin stamps. It ..
CA$175.00
18p Bright Green FCP CB (1991) Phosphor Omitted The Complete Machin Catalogue number TCM WA38e. This item was part of a large estate of Machin stamp..
CA$205.00