Weston Photronic Exposure Meter Model 650. Photoelectric exposure meter
1935
Early moving coil voltmeter
1889
Direct reading two-range voltmeter
1900
Weston Photronic Exposure Meter
Weston Standard portable alternating and direct current wattmeter no.302
A.C. ammeter model 155
Weston moving-coil ammeter, 1889-1900
1889-1900
Standard cell, model 4, serial no.3653
1900
Weston thermoammeter
Weston Photronic Exposure Meter
circa 1934
photo-electric exposure meter model 627
circa 1938
Moving coil portable galvanometer
1890-1891
Weston galvanometer, model 375, 30-0-30
1926
Weston direct-reading alternating and direct current voltmeter
1936
Weston model 440 galvanometer
1926
D.C. galvanometer relay model 30 no. 24904
1939
Moving-coil voltmeter
1951
Ammeter model 45 no.457 by the Weston Electrical Instrument Co.
1900-1919
Weston Cine exposure meter
Weston Electrical Instrument Co Synchroscope 60Hz
Single-phase portable a.c. and d.c. wattmeter
1926
Model 603 illumination meter by Weston Electrical Instrument Co.
1928-1938
Weston thermo-milliammeter model 425
Model 617 Universal exposure meter with leather case and strap
Weston direct-reading laboratory-standard millivoltmeter no.780
1920
Ammeter shunts
Benjamin 'Model B' Lightmeter
1930-1950