British Indian Ocean 1968-70 10r 'Lion fish’ error, SG 30aBritish Indian Ocean 1968 70 10r 'Lion fish error, SG 30a. A superb unmounted mint upper marginal IMPERFORATE VERTICAL PAIR, with full original gum. A very rare imperforate error, with only 25 pairs believed to exist. Exceptional value for such a key philatelic rarity. The British Indian Ocean Territory was created as a crown colony on 8 November 1865 when it comprised the Chagos Archipelago, previously administered by Mauritius, together with the