POCKET FOB WATCH METER, 1920's

Engineers pocket meter, moving Iron type, which looks like a pocket fob watch.
120 Volts Ac or Dc could have been the normal mains voltage before 1930.

Your comments:

• This is a 'Moving Iron' meter (note the uneven scale typical of such instruments) and could be used on both AC and DC.
  .......... John Webb, , 18th of March 2010
  
  

A0300