A very good 19th century antique treen pill silverer. 
Turned from boxwood with a threaded lid. Both the condition and colour/patina are very good. Stamped to the lid S Maw & Son
The company traded at Aldersgate St between 1860/70, under this name.
It measures 10.5cm h x 7cm w
 
Pill silverers were used once the pills had been formed and dried, they were dampened with mucilage of accia and mixed with silver leaf. The spherical pill silverer was then shaken in a rotary movement until all the pills were coated in silver.