CAMBRIDGE RESISTANCE BRIDGE CALENDAR & GRIFFITHS, 1887

Resistance Bridge (Collins Patent) with pots normally containing a liquid, using pegs, which when dipped, creates a switch.
Messrs Calendar and Griffith invented their Bridge in 1878, it went on to be used well into the 1930's.

Your comments:

• The styling of this instrument, especially the diamond tops to the pegs, makes me wonder if this Mr Griffiths is the same man who joined Mr Sullivan of Sullivan & Griffiths fame? HW Sullivan's first chief engineer was a Mr Griffiths??
  .......... Stewart Hawkins, Shirley, Surrey, UK, 20th of April 2015
  
  

A0976