It's a coin in the shape of a canoe, made in Thailand made all the way up to the 19th century, started making in 14th. But that is just about all i know of this coin.
There are varieties of them in silver and gold and they circulated mainly in the Mekong delta region. I have a silver "tam" or tiger tongue money from Laos that is about 400-500 years old that is a similar form but has counterstamps on it,