This is a boxwood case with the unusual feature of having two glass measuring  devices. In the centre is a narrow minimmedicine measuring cylinder and sitting over the top is  the glass measuring beaker. 

It has stamped on the lid S Maw, Son & Thompson London. They operated out of London between 1870-1900, when Thompson retired and the company was renamed.

It measures 8cm h x 6.3cm w

Antique Boxwood case - Unusual having two glass measures