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