Simpson model 260 Multimeter which has a 2000
ohms/volt meter movement is
housed in an bakelite case. I have no instruction manual. It is one of
many instruments collected by Bob Evans
which I have
been given by his daughter Alice Kirby
It was very grubby when I received it, would not work on any of the
ranges and the batteries which had been in place for many years had
corroded the fixings.
I discovered that the meter movement was functioning but after a
cursory investigation decided that the instrument was not worth
repairing so I decided just to keep the meter.
Batteries two 3 Volt batteries, (Burgess 422 or Eveready 750)
and one ("C" Size) 1½ Volt battery. Two "AA" cells soldered
together had been used as replacements for the former.
How old is it? according to this page http://simpson260.com/260-1/simpson_260-1.htm
this appears to be one of the earliest model 260 multimeters and would
have been made in the early 1940's or even earlier.