There is a guy here who collects them, I think his CT name is Long John Silver, or something like that? Well, something silver anyway.
Sure! Java, Bali and the Eastern Archipelago Java, Kalasan or Kelurak (Empire of the Sailendra) AR Masa 11 mm x 2.32 grams Struck 778-782 AD. Obverse:MA (Massa) - Early Nagari Script Reverse: Irregular Sandalwood Flower place in Incuse square.
Not quite ancient, There were no coins struck in Malaysia in the ancient period. These are about AD 800, so for most schools of thought they are technically medieval, but they are among the earliest struck coins of the region.
AN is right. Malaysia struck no ancient coins. The only ancient coins struck in all of SE Asia was those of Funan, the proto-civilization of SE Asia. They struck silver coins around 4-5th centuries. After that, coinage pops up again about the 8-9th civilization in Burma, Thailand, Vietnam, and Malaysia. Burma, Thailand, and Malaysia followed Funan coins, and Vietnam followed Chinese coinage traditions.
It's a toss up what came first Funan or Pyu. I think scholars are leaning towards Pyu, silver coins based on Gupta gold.