BANKER'S WEIGHTS.

These are based on the Tolchah, the Máshah, and the Surkh.

Formerly 6 now 7½ rice-grains = 1 Surkh
  8 Surkh = 1 Máshah
  12 Máshah = 1 Tólchah.

The ordinary weights in use are ½, 1, and 4 Surkh: 1, 2, 4, 6, Máshah: 1, 2, 5, 10, 20, 50, 100, 200, 500 Tólchah. But in the imperial Exchequer, the gradations of weight kept ready are very numerous.