Bengal Sultanate, Rukn-ud-din Barbak Shah (AH 864-879 /1459-1474 AD), Khazana Mint, Gold Tanka, AH 868, Tughra Style, Plausibly struck from a silver die, Obv: Arabic legend in Tughra style “Rukn ud dunya wa'l din abu'l muzaffar Barbakshah al-sultan bin Mahmud shah al sultan”, Rev: Arabic legend “al-muayyud bitayid-ur-rehman khalifat allah bil hujjat wal burhan”, 10.84g, 23.19mm, (Unlisted in G&G), no test marks, some flatness, sharp strike, luster, XF-AU, Extremely Rare.

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