1 Katun

Tin coinage was the dominant small-change medium across the Malay Peninsula for centuries, produced locally in forms ranging from crude cast ingots to struck pieces, with Johor among the more prolific sultanate issuers. The katun denomination served the lowest tier of everyday market exchange — pepper, rice, small debts — in an economy where Dutch and later British trade pressures were steadily eroding indigenous monetary systems.

Singh's cataloguing of Straits sultanate issues remains the primary reference for these pieces, and the SS30 attribution places this firmly within the later Johor series. Tin's susceptibility to pest tin disease makes genuinely problem-free survivors harder to find than mintage alone would suggest.