Kautilya's Arthashastra 2.19.13

2.19.13

tasyāḥ pañcapalikaṃ maṇḍalaṃ baddhvā samakaraṇaṃ kārayet //

A balance called samavrittá, with its lever 72-angulas long and weighing 53 palas in its metallic mass shall also be made. A scalepan of 5 palas in the weight of its metallic mass being attached to its edge, the horizontal position of the lever (samakarana) when weighing a karsha shall be marked (on that part of the lever where, held by a thread, it stands horizontal). To the left of that mark, symbols such as 1 pala, 12, 15 and 20 palas shall be marked. After that, each place of tens up to 100 shall be marked. In the place of Akshas, the sign of Nándi shall be marked.