Definition of "hubba"

Diamonds and pearls are sold by hubbas and ruttees; 8 hubbas equal to 1 ruttee, about 2 grains troy.

1825, William Milburn, Thomas Thornton, Oriental Commerce, page 111

The camp Banyans, to make their purchases of him, pay the assize your Highness may fix, and not a hubba shall be taken without payment being made.

1786, Warren Hastings, India Courier Extraordinary, page 307