1917-21 1c and 10c to 50r complete set of seventeen imperf. plate proofs in issued colours on gummed watermarked paper, very fine and rare exhibition set (Image)

1917-21 Multi Crown CA 1c to 50r set of seventeen with additional 25c on pale yellow and 75c on emerald, all in strips of three overprinted “Specimen” and tied on three pieces of ledger page cancelled with strikes of the “Postes Et / Telegrahes / Collection / De / Berne / Madagascar” handstamp in red, toning around 75c, a spectacular and unique assembly (Image)

1919 (Jun 4) Envelope with 1917-21 25c, 50c and 75c tied by Bagamoyo double-ring datestamp, sent registered to Switzerland with faint registration handstamp in violet at lower left, arrival bs, fine (Image)

1921 Wmk Mult Script 12c to 3r in strips of three and 5r pair and a single, all overprinted “Specimen” and tied on two pieces of ledger page cancelled with strikes of the “Postes Et Telegrahes/Collection/De/Berne/ Madagascar ” handstamp in red, a colourful and unique group (Image)

1922 Seriffed overprint 1c and 10c in strips of three, tied on piece of ledger page cancelled with strikes of the “Postes Et Telegraphes / Collection / De / Berne / Madagascar” handstamp in red, unique (Image)

1923 Wmk Script CA upright £1 orange & black mint hinge remainder, very fine (SG £350) (Image)

1927-31 5c to 25c, 30c black and dull purple and 40c to 1s overprinted “Specimen” and additionally handstamped “Especimen” applied in Lisbon for despatch to Portuguese colonies, part to large part og (toned), a rare and elusive group. (Image)

1927-31 5c to £1 set of sixteen overprinted or perforated “SPECIMEN”, the 5c. to 1s additionally handstamped “Especimen” applied in Lisbon for despatch to Portuguese colonies, affixed to ledger piece marked “Tanganyika (dezasseis selos)”, several defects, a rare group (Image)

1927-31 5c to £1 set of sixteen, all in strips of three (the right-hand 10s with cut in scroll variety) overprinted “SPECIMEN” and tied on two pieces of ledger page cancelled with strikes of “Postes Et Telegrahes / Collection / De / Berne / Madagascar” handstamp in red, unique (Image)

1927-31 5c die proof in black on glazed card (92x60mm) marked “Before Hardening”, fine (Image)

1927-31 10c die proof in black on glazed card (92x60mm), marked “Before Hardening” and dated “9 Jun.1926”, fine (Image)

1927-31 10c die proof in black and slate-violet on thin surfaced card with 3-5mm margins, very fine, ex Danson (Image)

1927-31 15c die proof in black on glazed card (92x60mm) marked “Before Hardening”, fine (Image)

1927-31 20c die proof in black on glazed card (92x60mm) marked “Before Hardening”, fine (Image)

1927-31 25c die proof in black on glazed card (92x60mm) marked “Before Hardening”, fine (Image)

1927-31 30c die proof in black on glazed card (92x60mm) marked “Before Hardening”, fine (Image)

1927-31 40c die proof in black on glazed card (92x60mm) marked “Before Hardening”, fine (Image)

1927-31 50c die proof in black on glazed card (92x60mm) marked “Before Hardening”, fine (Image)

1927-31 75c die proof in black on glazed card (92x60mm) marked “Before Hardening”, fine (Image)

1927-31 10s grey-black and blue imperf. plate proof marginal block of four from the foot of the sheet on gummed unwatermarked paper, light gum wrinkle and bend, fine and scarce (Image)

1930 (Jun 21) Envelope from Bombay to Dar-es-Salaam bearing 5c in combination with KUT 15c sharing Bombay cds and showing superb Bombay “Paquebot” framed handstamp with Camp Post Office arrival cds alongside, minor soiling, unusual (Image)

1931 (Jul 7) Envelope (opened out for display) sent registered from Mnyussi to Germany bearing 1927-31 5c (2), 20 and 50c all cancelled by “Kilimanjaro – T.P.O./Up” cds with registration label completed in manuscript at foot, reverse with TPO, Moshi, Mombasa and arrival cds (Image)