1955-58 Castles mint n.h. set of four Waterlow printing and mint n.h. set of four De La Rue printing, very fine and fresh (S.G. £850). (Image)

1955-58, De La Rue Castle 2s6d black-brown, multi crown watermark, mint n.h., showing the reversed image on gummed side offset variety (Pierron F880Fa), as well as a shift transfer, Bridger and Kay hs in margin, has a pre-printing diagonal crease, otherwise very fine and scarce with around 90 mint examples known. (Image)

1955 9d bronze-green, mint n.h. imperforate imprimatur pair from the foot of the sheet showing central sheet ornament in the margin, the reverse handstamped "BPMA", scarce. (Image)

1956 Wildings 1 1/2d green mint n.h. imperforate imprimatur pair from the foot of the sheet, the reverse with "BPMA" handstamp, fine and scarce. (Image)

1958 2d. light red brown (crisp print) "Dollis Hill Phosphor Trial" very fine perforated block of four on ungummed, unwatermarked Specially prepared handmade paper, without phosphor; rare. (Image)

1959 3d deep violet "Dollis Hill Phosphor Trial", mint n.h. perforated block of six on gummed watermarked paper, with two 3mm blue phosphor bands printed over the ink, very fine and scarce. (Image)

1958 3d deep violet "Dollis Hill Phosphor Trial" perforated horizontal strip of three on ungummed unwatermarked specially prepared hand made paper, with all over blue phosphor showing a strong phosphor reaction, scarce. (Image)

1959 Wildings 3d deep violet "Dollis Hill Phosphor Trial" perforated block of four on gummed crowns wmk (sideways left) paper, with one 4mm blue phosphor left side band printed over the ink, very fine and scarce (S.G. Spec ST7(3)f). (Image)

1958 1s Bistre brown double impression in mint n.h. corner marginal cylinder (4 no dot) block of six from the lower left of the sheet, very fine variety; cert. RPS (1989) (S.G. Spec. S138a). (Image)

1963 6d Paris Postal Conference Centenary imperforate imprimatur, mint n.h. marginal from the upper right of the sheet, the reverse with "BPMA" handstamp, very fine and scarce. (Image)

1964 20th International Geographical conference set of four imperforate imprimaturs with "NPM IMPRIMATUR" handstamp on reverse, mint n.h., very rare, one of 10 sets released for the NPM archive sales. (Image)

1964 20th International Geographical conference set of four imperforate imprimaturs with "NPM IMPRIMATUR" handstamp on reverse, mint n.h., very rare, one of 10 sets released for the NPM archive sales. (Image)

1965, Album page study of the Battle of Britain 9d (3) and 1/3d (3) showing the colour shift of orange to the left on the 9d and colour shift of bright-blue to left on the 1/3d, also includes other minor varieties, a fine section of six mint n.h. stamps nicely presented.

1965, Album page study of the 25th Anniversary of the United Nations 3d, illustrating three different varieties, mint n.h., a corner marginal block of six with a major misperforation, a block of four bottom marginal phosphor with the lake in Russia variety, and a block of four bottom marginal ordinary paper showing the same variety, very fine, attractively written up.

1966 1/3d Battle of Britain, the unique cylinder block of six imperf. imprimaturs from the lower left corner of the sheet, mint n.h., each with "BPMA" handstamp on reverse. Rare. (Image)

1966, Album page study of the 1966 Landscapes 6d, with a min n.h. single alongside the normal stamp illustrating the dry printing error showing a lighter green and the words "Antrim N.Ireland" omitted, as well as a mint n.h. horizontal strip of three with the retouched misaligned "D", attractive page.

1966 British Birds (phosphor) mint n.h. se-tenant block of four with variety bistre omitted affecting all four stamps, top right corner marginal, offered with a normal for comparison, very rare so fine, especially without the usual gum toning (S.G. £6'000+). (Image)

1966 British Technology 6d deep blue & orange, on chalk-surfaced paper, showing Red "Mini cars" omitted used with part Gilford cds (Co. Down), very fine and an exceedingly rare modern error, cert. BPA (2023) plus 1966 Birds se-tenant block with red-brown omitted (S.G. £200+) and 1970 Anniveraries 1s with gold omitted, plus cylinder blocks of each stamp (S.G. 702a, £12'000 as a mint example, unpriced used). Note: This item was discovered by the owner when wading through mounds of kiloware (see copies of magazine articles enclosed). (Image)

1967, EFTA 9d mint n.h. showing lilac omitted error, very fine and scarce variety, plus normal for comparison (S.G. £130). (Image)

1967-70 8d bright vermilion, mint n.h., variety phosphor omitted, scarce. (Image)

1967, British Bridges, 4d black, bluish-violet turquoise-blue and gold, mint n.h., left block of eight, printed on gummed side of paper error, comes on a page with a corner marginal, mint n.h. pair, 1/6d showing a minor flaw; scarce variety with 600 known examples recorded.

1967, British Bridges, 9d black, red-brown, myrtle-green, ultramarine, olive-brown and gold, mint n.h. side marginal block of nine with dramatic doctor blade flaw, comes written up on an album page which includes a mint n.h. block of four showing the downward shift of the gold (Queen's head), very fine and scarce.

1968, Machin 5d Royal blue mint n.h. side marginal block of four imperforate (cylinder 10), together with a 1969 2d lake-brown, two phosphor bands, with eye catching misperforation variety running vertically through stamp, a very fine duo. (Image)

1968 British Bridges set of four imperforate imprimaturs from the right of the sheet, mint n.h., each with "BPMA" handstamp on reverse, very fine and scarce. (Image)

1968 British Anniversaries set of mint n.h. imperforate imprimaturs from the original NPM sales, very rare with only 10 sets released. (Image)