Weston Master II Light Meter
The second of the Weston Master series, this meter was being produced at Newark NJ in 1946 and Sangamo Weston in Enfield, Middlesex a little later. It is made of aluminium alloy with water tight seals with a much improved slimmer magnet and coil assembly.
These meters use the Weston film speed system - the equivalent of ASA and ISO.
https://www.westonmeter.org.uk/westontwo.html
Details
Details
On back:
Sangamo Weston Ltd
Enfield, Middx., Eng.
Model No. S141/735
No. 01287
Pat.No. 531996