This is a rare gadget stick, featuring a silver top and collar with hallmarks for: 
London 1892 
Along with a makers name: 
Swaine & Adeney London 
Swaine London, also known as Swaine Adeney Brigg, perfected its sophisticated and traditional designs, rendering them as a world-class British manufacturer of the highest quality whips and sticks. ​

There is also a silversmith's mark G.V for the famous London-based stick and whip mounter: 
George William Vose 

The silver top pulls up to reveal the hunting hound measuring stick, complete with measurements in both inches and centimetres, a pull-out brass level with its original spirit level.

Measures up to 33" / 85cm 

Malacca shaft with an original metal ferrule. 

The perfect rare item for a hunting collector. 

 Measurements: 
Length when closed - 48cm 
Length when fully opened - 88.5cm 
Diameter of the top - 2.3cm 
Diameter of the shaft under the collar - 2cm 
Weight - 171g  
 
Very good condition with some small age marks.