Bengal Sultanate, Ghiyath-ud-Din Mahmud, Da Mint, Gold Tanka, Badar Sahi (New Type), Obv: al-sultan bin al sultan ghiyath al-dunya wa'l din abu'l muzaffar, Rev: mahmud shah al-sultan bin husain shah al-sultan khuldallahu mulkahu wa sultanahu, 10.78g, 20.24mm, Unlisted Type in Goron & Goenka, about very fine, Rare.

Coins of this ruler are listed as RRR in Goron and Goenka book and considering this particular specimen as unlisted type in the book it should certainly be rated as RRRR on the rarity scale.

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