GIRAY KHANS: Shahin Giray, 1777-1783, AE ischal (73.94g), Kaffa, AH1191 year 6, A-2117, Ret-241 obverse, 240 reverse, Sariev-494, 53mm, toughra reverse, floral twig left & right of the toughra, struck on modestly uneven planchet, nice Fine, RR, ex Dick Nauta Collection. The ischal, also known as tschal, is a name derived from the Persian word "chahal", meaning "40". The ischal alloy is said to be a billon alloy containing 5% silver, but that has never been verified.
