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Watkin's Bee Meter. Watchform actinometer. In original box with instructions (12th edition)

Watkins Bee Meter

Watkins' Bee meter.

Watkins' Bee meter.

Watkin's Standard exposure meter (1900 pattern).

Watkin's Standard exposure meter (1900 pattern)

1900

Watkin's time thermometer for autochromes.

Watkin's Time Thermometer for Autochromes

Watkins' temperature coefficient calculator.

Watkins' Temperature Coefficient Calculator

Watkins' snipe meter, c. 1920.

Watkins' Snipe Meter, c. 1920

1920

Watkin's time thermometer, (commercial pattern).

Watkin's Time Thermometer, Commercial Pattern

Watkins dial meter, 1900.

Watkins Dial Meter

1900

Watkins Junior meter, c. 1895.

Watkins Junior Meter, c. 1895

1895

Watkins Bee exposure meter with instructions and speed card, 1926.

Watkins Bee Exposure Meter with Instructions and Speed Card

1926

Watkin's experimental time thermometer.

Watkin's Experimental Time Thermometer

Watkins Factorial calculator. Development calculator - two concentric discs bearing scales 1-50 (factors) 1 1/4-50secs. - time of appearance of image. Aluminium; [with joint instruction book for darkroom clock and calculator].

Watkins factorial calculator

Watkins' watch meter earliest pattern, c. 1907.

Watkins' Watch Meter Earliest Pattern

1907

Watkins' print meter, c. 1910.

Watkins' Print Meter, c. 1910

1910

Watkins "Bee" exposure meter with original box and instructions and separate dial for autochromes.

Watkins "Bee" Exposure Meter with Original Box and Instructions

Watkins' focal plane meter, c. 1907.

Watkins' Focal Plane Meter

1907

Watkins standard exposure meter, 1890.

Watkins Standard Exposure Meter, 1890.

1890

Watkins dial meter experimental model, Hereford, England, c. 1900.

Watkins Dial Meter Experimental Model

1900

Special Watkin's Diaphragm designed to give equal spaces between U.S. values for a calculating shutter, c. 1902.

Special Watkin's Diaphragm designed to give equal spaces between U.S. values for a calculating shutter

1902

Watkins exposure meter, barrel type with chain; shorter variety.

Watkins Exposure Meter, Barrel Type with Chain

Watkins' calculating shutter, fitted to Bausch & Lomb Optical Co. shutter).

Watkins' Calculating Shutter

Watkins' indoor meter, 1900.

Watkins' Indoor Meter

1900

Watkins' exposure meter, (earliest experimental model of 1889).

Watkins' Experimental Exposure Meter

1889

Watkins' experimental testing tank for testing plates in stages of development for their temperature coefficient.

Watkins' Experimental Testing Tank