A set of Indian/Asian/Chinese opium scales

Case made of wood, bone stick and metal dish

1920s or so?

Length; approximately 12 and 1/2" long

Condition generally good but;

Dish isn't attached  - needs tying on again

The metal clasp that slots into the base has made slightly too big a hole, so it isn't always secure

There's a round space in the scales box which is empty - presumably a counter-weight is missing?