19th Century Brass Chamberstick with Push-Up Mechanism

19th Century Brass Chamberstick with Push-Up Mechanism 
A 19th century brass chamber candlestick with a circular drip pan, shaped stem, and side handle with thumb rest. 
It features a simple push-up mechanism to adjust the height of the candle. 
The surface shows age-related wear and tarnishing, particularly to the base, with some marks and spotting to the pan. 
The mechanism appears intact, though untested. 
The overall condition is consistent with age and regular use. 

Dimensions: 
Height: 12 cm 
Diameter of base: 15.5 cm 
Width including handle: 16 cm