World coins
The Caliphate
Islamic, Abbaside Caliphate, Dirhems from three different rulers.
Al-Mansur, AH 136-158 (754-775), mint Al-Salam, 150 AH, 2.48 g;
Al-Mahdi, 158-169 AH (775-785), mint Al-Moham, 161 AH, 2.85 g;
Harun al-Rashid, 170-193 AH (768-809), mint Al-Salam, 180 AH, 2.95 g. (3)