Opium weight, Hintha 3B, 1 viss / 100 tical (1'506 g), Burma (Myanmar), prior to 1868
A fraudulent merchant's weight with a cavity in the bird's body!

References: Michael Herrfurth and Hartmut Mollat, Beauty and the Beast, Arts of Asia, Special Burma Issue, vol. 43 no. 3, May - June 2013