Weston Master II Universal Exposure Meter Model 735
The Weston Master II S141/735 was an exposure meter manufactured by the Sangamo Weston Company of England. This meter is used in the field of photography to measure the reflected light and therefore the brightness level of a scene. It is a photoelectric device with a built-in photocell, which detects light. The internal circuitry then displays the light reading through a meter that has a calibrated dial showing exposure combinations.