Dear Paul, your coin:
Malay peninsula (Palembang), no date, Tin, 1 Pitis, Palembang mint (1758-1776 AD).
Obverse:
Jawi text around coin:
ضر(ب) في بلد فلمبنغ (فاليمباغ) دار (الاس) لام , Zarb fi bilad Palembang dar al-Islam.
Undated type with fi written as upright ligature (with dots below).
Palembang ( فاليمباغ ) is the capital city of the Indonesian province of South Sumatra. Palembang is the second most populous city in Sumatra, after Medan, the ninth most populous city in Indonesia.
Maythem