The bells were used in neck large domestic animals (horses, cattle, llama, camel, elephant, etc.) for recognition, guidance, removing predators or hostile spirits.
Its clappers on the outside of the gong and shaped like elephants. This is apparently a cow bell for an elephant (or elephant bell!). It produces a wonderful clear sound.
This Burmese (Myanmar) wooden slit bell is part of Joel Garten collection, where you can see some other interesting pieces. http://joelgarten.com/blog/?p=20