The second of the Weston Master series, this meter, model number 735, was being produced at Newark NJ in 1946. It is made of aluminum 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. Perhaps the most esthetically pleasing model and certainly better made than the III, it outsold all other models in the Master range.