Watch List notes:

Islamic Coins, Abbasid, temp. al-Mansur, silver dirhams (10), al-Rayy 146h, 147h, 148h, al-Muhammadiya 148h-153h, 155h; temp. al-Mahdi, silver dirhams (6), 160h, 161h, 165-168h; al-Rashid, silver dirhams (18), 170-173h, 175h, 180-184h, 186-193h; al-Amin, silver dirham, 195h; al-Ma'mun, silver dirhams (2), 200h, 201h, the year 170h with small piercing, all coins very fine or better, many extremely fine (37)
A comprehensive date run of 37 Abbasid silver dirhams from the mint of al-Rayy (146-148h)/al-Muhammadiya, struck between 146h and 201h