ZANZIBAR 1896 SG29k Mint 2½ on 1a6p sepia type 6 surcharge variety Roman 1 in fraction ½

1896 (15 Nov) "2¬Ω" on 1a6p sepia, type 6 surcharge, showing variety Roman "I" in fraction "¬Ω", large part o.g. One slightly shortish perf and an insignificant bend mentioned for accuracy, still fine and very rare, with few examples recorded and only 16 panes surcharged. Ex Griffith-Jones (Spink 24 Oct 2018, lot 189). [The overprint has small second "z", but is not readily plateable. The fact that the Royal Collection includes two examples of the "Inverted 1" respectively in a block and strip of 3 se-tenant with SG 31 indicates that the surcharge setting used for SG 29/31 was not identical to that used for SG 26/8.] - P245000083