1937-47, 1d scarlet imperf. imprimatur tête-bêche gutter pair, mint n.h., with NPM handstamp on reverse, very fine and very rare, ex NPM archives. (Image)

1937-47 2 1/2d ultramarine imperf. imprimatur pair, mint n.h., reverse with N.P.M. handstamp, very fine and rare. (Image)

1941-42 1d pale scarlet (pale colours), superb mint n.h. imperforate imprimatur horizontal pair, "BPMA" handstamp on reverse, scarce. (Image)

1947 "CONGRES POSTAL UNIVERSEL À PARIS 1947/ TIMBRES-POSTE BRITANNIQUES", A red leatherette and gold tooled album including photographs of the inception of stamps and also showing "current stamps" to 10/- and postal stationery items mounted on pages; scarce so fine and intact.

1947 11d Plum group with single franking on cover to France, cover with India with 11d and 1d and mint n.h. lower left corner pair with "spot in G" variety (SG. Q27c).

1950-52 1/2d to 4d definitives (New colours), a superb mint n.h. set of six imperforate imprimaturs with "NPM IMPRIMATUR" hand stamp on reverse; very rare with only six sets released for the NPM Archive sales. (Image)

1950-52 1d Light Ultramarine mint n.h. imperforate imprimatur vertical tête-bêche gutter block of four with "NPM / IMPRIMATUR" hs on reverse, very fine and rare. (Image)

1951 Festival of Britain set of two imperforate imprimaturs from the left of the sheet, mint n.h. with BPMA handstamps on reverse, very fine. (Image)