Watkins Dial Meter Experimental Model
1900
Watkins Standard Exposure Meter, 1890.
1890
Watkins Bee Exposure Meter with Instructions and Speed Card
1926
Watkin's Experimental Time Thermometer
Watkins' Experimental Exposure Meter
1889
Watkins Dial Meter
1900
Watkins' Print Meter, c. 1910
1910
Watkin's Time Thermometer, Commercial Pattern
Watkins Exposure Meter, Barrel Type with Chain
Watkin's Time Thermometer for Autochromes
Watkins' Snipe Meter, c. 1920
1920
Watkins' Experimental Testing Tank
Watkins' Temperature Coefficient Calculator
Watkins' Watch Meter Earliest Pattern
1907
Special Watkin's Diaphragm designed to give equal spaces between U.S. values for a calculating shutter
1902
Watkins factorial calculator
Watkins' Bee meter.
Watkins Junior Meter, c. 1895
1895
Watkins Bee Meter
Watkins' Focal Plane Meter
1907
Watkins Colour Plate Meter
Watkins' Indoor Meter
1900
Watkins' Calculating Shutter
Watkin's Standard exposure meter (1900 pattern)
1900