Glass Coins 上市 Deposited
The Nummi Vitrei, or Monnaies de Verre, originated under the Roman Emperors in Egypt, continued through the Byzantine period, and were then adopted by the Arab invaders. Those resembling Arabic coins in size, weight, and inscriptions are nothing else but standard weights issued mainly for the purpose of testing the accuracy of current coins. They were issued by the governors under the Amawee and Abbasee Khaleefehs, but were commonest under the Fatimide rulers and lasted until the Turkish conquest.
Conf. Lane-Poole, Catalogue of Arabic Glass Weights in the British Museum, 1891.
- Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)