Watch List notes:

WORLD COINS, ISLAMIC, Artuqids of Mardin, Nasir al-Din Artuq Arslan, Copper Dirham, 10.61g, Mardin 599h, crowned centaur-archer left, rev legends naming Caliph, Ayyubid overlord, and Nasir al-Din (SS 38/2; BMC 432-437; Butak 42). Overstruck on preceding issue SS 37 with trace of bust on the reverse, fine, reverse better, scarce.

Estimate: £40-60