1937-39 KGVI 1/2d, 1 1/2d, 2d, 2 1/2d and 8d with "SPECIMEN" handstamps in green by the Portuguese Colonial Postal Administration in Lisbon, all mint n.h., all slightly toned and 8d with gum creases, outstanding and exceedingly rare group, cert. BPA (1992). (Image)

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 5d brown mint block of eight (2x4) showing doctor blade flaw variety affecting left column of four stamps, very fine. (Image)

1937-47 6d purple mint vertical strip of four showing vertical doctor blade flaw variety, very fine. (Image)

1937-47 9d deep olive-green mint vertical strip of four showing vertical doctor blade flaw variety, very fine. (Image)

1937-47 10d turquoise-blue mint vertical strip of three showing vertical doctor blade flaw variety, very fine. (Image)

1941-42 1d pale scarlet mint right marginal block of 15 showing dramatic dry print with six stamps missing most if not all of the printing, sheet number at right, weak perfs vertically with some perf. separation, a spectacular showpiece. (Image)

1941-42 2 1/2d blue mint block of eight showing vertical doctor blade flaw variety affecting two stamps, very fine. (Image)

1950-52, New Colours 1/2d to 2 1/2d set of five imperf. imprimaturs, wmk inverted, each with BPMA handstamps on revere (except 1/2d), 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)