Arabic inscriptions and date: Sultan Palembang Sanat 302 (error date for 1203 AH = 1788 AD) / Blank. Struck on a cast tin flan. 18mm, 0.58 grams. Krause -; V.LaHaye/E.Spanier & Fils Lith Du Roi #191; cf. Zeno 187184 (this coin)
Very interesting crude type.
Palembang is a city in the Northern area of Sumatra, Indonesia. It was once a Portuguese colony, and later the seat of the Sultanate of Palembang. These coins used to be quite rare and expensive, until a number of large hoards made them generally available and relatively cheap. For example, coins of this type were sold by Münzen & Medaillen Deutschland GmbH, Auction 10 (March 22nd, 2002), #681. It was a lot of 3 pieces (same types as this coin and the same type of Badr-ud-din), sold for 120 Euros + auction commissions.