Watch List notes:

CRUSADER IMITATIONS OF ARABIC COINS. ISLAMIC AND OTHER COINS AND WEIGHTS. FATIMID. Glass weight for half a dirham, legend on both sides, obv. al-imâm / az-zâhir, rev. (muhammad / ra)sûl / (al)lâh. Balog, Annali 1972, 216-218. 1.48 g. Obv. very fine, rev. as usual unclear.
Very fine