A coin is a piece of solid objects that is uniform in weight, is created in large quantities in order to assist trade. In the time of historical it was play vital role in trade among dynasty to dynasty. It was symbol of power of a ruler. The coins are the most important artifacts of the Mainamati and Lalmai excavations. As many as 450 coins including (three hoards of 227 coins) of various sizes and types were recovered. The Vast majority of the coins are of silver. Gold coins and coins of other base metal are few in number. Though not so significant as those of the silver coins, the gold coins are important as some of them represent the earliest coins recovered from stratigraphical levels in this region.
Earliest in date are two gold coins belonging to the imperial Guptas period. On the basis of this assumption, we may conclude that the coin under discussion was also issued by one of the early Deva rulers in imitation of the Gupta coins. All most all these coins in the early phase of Shalban Vihara, datable to 8th /19th century, preclude this possibility.
Two other coins – one is silver and other gold, are of great interest as those belong to the abbaside rulers of Baghdad
The gold coin found in Kutila Mura excavation in 1957, belongs to the last Abbaside Caliph Abu Ahmed Abdullah Mustaasim Billah (1242-1258 A.D.) the discovery of the Abbaside coins from Mainamati provides us with evidence of trade relations between the Arab countries and The discovery of the coins and some gold ornaments from inside the cells of the monastery testify to the prosperity of the Buddhist Viharas in those days. The monks received these as donations or gifts from the devotes.
