Measurements:
Height: 5.8 cms
Diameter: 5.8cms
Lovely old, beautifully made ebony screw lidded pot.
Any visible wear totally commensurate for age.
I suspect that this was part of a dressing table set. I have seen them as powder puff containers, hat pin pots etc. Containers for bits of hair or female or male frippery such as hair grips, jewellery, studs for collars etc.
Still very functional & useful and very attractive.