1952-53 Wildings 1 1/2d to 2 1/2d set of three marginal imperforate imprimaturs from the foot of the sheet from the sideways coil printing, with "BPMA" handstamp on reverse, rare. (Image)

1955 Wilding 1d ultramarine imperforate top marginal booklet pane of three stamps with printed labels underneath each one, superb mint n.h., with "BPMA" handstamp on reverse, rare. (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)

1958 Wildings 2d red brown "Dollis Hill Phosphor trial" horizontal pair on un-gummed un-watermarked specially prepared hand made paper, with all over green phosphor showing a strong reaction, scarce (S.G. Spec. ST4 (3)a). (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)

1963 Freedom from Hunger 2 1/2d and 1/3d imperforate imprimaturs, mint n.h., the reverse showing "NPM IMPRIMATUR" handstamps, very fine and scarce. (Image)

1963 Churchill 4d. and 1s3d imperforate imprimaturs, mint n.h., reverse showing "NPM IMPRIMATUR" handstamps; 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)

1966 9d Battle of Britain imperforate imprimatur corner marginal traffic light vertical strip of three from the lower right of the sheet, mint n.h., each stamp with BPMA handstamp on reverse, very fine and unique positional item. (Image)

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)

1967 British Bridges group of varieties incl. 4d mint n.h. left block of eight printed on gummed side of paper error, 9d mint n.h. right marginal block of nine with dramatic doctor blade flaw, 9d mint n.h. block of four showing the downward shift of the g

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)

1968 4d Christmas imperforate horizontal pair of imprimaturs, mint n.h., showing variety "Retouched dapples" in position R12/4, each with BPMA handstamp on reverse, superb and unique (S.G. Spec. W142f var). (Image)

1969 1s6d British Cathedrals, variety face value omitted, mint n.h., very scarce as Pierron records only 42 examples, many of which are damaged (S.G. £1'500). (Image)

1973 European Communities set of three imperf. imprimaturs from the right of the sheet (the 5p in se-tenant pair), mint n.h., each with "BPMA" handstamps on reverse, very fine and scarce. (Image)

1973 British Paintings set of four mint n.h. imperforate imprimaturs from the foot of the sheet, each with "BPMA" handstamp on reverse, very fine and scarce. (Image)

1973 Inigo Jones set of mint n.h. se-tenant pairs with variety phosphor omitted (shows as a white background rather than a cream background), offered with normals for comparison (S.G. Spec. W225/6b). (Image)

1974 10p Medieval Warriors imperforate imprimatur in mint n.h. right hand marginal vertical gutter pair, each with "BPMA" handstamp on reverse, scarce. (Image)

1974 Winston Churchill 5 1/2p imperf. imprimatur in mint n.h. traffic light corner block of four, each with "BPMA" handstamp on reverse, very fine and scarce. (Image)

1976 Social Reformers group of varieties, incl. 8 1/2p mint n.h. single with dramatic downward colour shift showing value above Queen's head, also a downward shift of the shading of the hands in mint n.h. single and block of four, and the mint n.h. 10p lo (Image)

1978 Christmas UNISSUED 5p, hinged on original Post Office presentation card with gilt logo at top along with the other four issued values, mint o.g., very fine and extremely rare with only two examples recorded. Note: The Post Office management asked th (Image)

1979 10p Christmas imperf. horizontal pair from the left of the sheet showing sheet number, mint n.h., very fine and scarce variety (S.G. £500). (Image)