Tipu Sultan, Silver Double Rupee, 22.74g, Patan Mint, AH 1199 Azal / RY 3 Azal, Obv: Persian legend “Ahmad din dar Jahn Ast Raushan ze fatah haidar he zarb Pattan saal i azal sanah 1199 hijri”, Rev: Persian legend “Huwa as sultan al waheed al adil seum ba