1895-96, 1a plum with "Zanzidar" overprint error (from the 1895 Dec setting, with second "z" small and dropped, row 4/6) in used pair with normal, light cds, very fine and rare variety on this value (S.G. £4'000+). (Image)

1895-96, 2 1/2 on 1a6p (type 2) mint block of nine with second stamps showing "Zanzidar" ovpt error, as well as showing broken p for n on fourth stamp, inverted "1" in "1/2" on sixth stamp and large thick "b" on ninth stamp, slightly toned gum, some perf. reinforcement, a spectacular showpiece for the specialist, cert. RPS (1987) (S.G. £2'200+). (Image)

1895-96, 2 1/2 on 1a types 3 and 4 (both second setting) se-tenant in mint left marginal block of four, with type 3 on left pair and type 4 on right pair, two diagonal creases affecting lower right stamp, otherwise fine and scarce multiple, signed T. Allen, cert. RPS (1985) (S.G. £1'350+). (Image)

1895-96 2 1/2a type 5 on 1a plum with small second "z", tied to small piece by light Zanzibar cds, a few short perfs at left otherwise fine; cert. BPA (2023) (S.G. £850). (Image)

1895-96, 2 1/2 on 1a6p mint block of 36 plus separated pair at top left, showing 17 examples of type 6, six examples of type 7 and 15 examples of type 8, on album page with diagram of the setting and highlighting four constant varieties of the "Zanzibar" ovpt, with six stamps in the block hinged, toned gum, a spectacular multiple and a showpiece for the specialist (S.G. £4'830+). (Image)

1913 1c to 10R used set of 15 with extras incl. two extra 10R, 20R, 30R (cert. RPS 1939, reperfed at foot) and 50R, the higher values sold as is, mostly fine to very fine (S.G. £4'630+). (Image)

1936 40c proof in sepia (issued colour) imperforate on ungummed lined paper in block of four, and 25c proof in unissued purple and 40c proof in sepia (issued colour) in imperf. vertical pairs on ungummed paper, very fine. (Image)

1956 Photographic essay with 3 rejected designs for the 1957 issue, affixed to card, signed on reverse "W.H. Bird", attractive and scarce. (Image)

Postage Dues. 1926-30 1c black on orange in used block of four on piece, cancelled by 5 DE 33 registered cds, very fine (S.G. £640+). (Image)

1926-30, used group with "cent.s" varieties in vertical pairs, with 9c, 18c on salmon (normal with tear), 18c on orange and 21c, each cancelled once in the lower left corner on the normal stamp, fine to very fine. (Image)

1930-33, group incl. complete unused sheets of the 2c, 3c, 6c and 25c on lilac, used set of 6 (some on piece) and unused singles of the 12c and 25c on pink, very fine group. (Image)