A silver coin originally issued under John V (1706- 1750) for the Portuguese Indies, and struck principally at Goa.
It was valued at half a Rupia and the type represents a bust of the ruler on the obverse and the Portuguese arms on the reverse. Varieties occur with the figures 300 stamped on them to indicate their value in Reis.
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)