Fatimids
'Ubayd-allâh al-Mahdî billâh, 297-322 H/910-934 AD Dinar 311 H, al-Mahdîya, double circle around obv. field and two dots below rev. field, beginning of mint/date formula at 10 o'clock. Nicol 56 var. (but compare his illustration 58 with double circles on both sides and a date read as 314 H. 4.18 g.; Very rare variety Very fine