Prosch Manufacturing Co. (New York, NY)

Triplex Shutter - c. 1886-c.1890's





Notes: 

The Prosch Duplex and Prosch Triplex do not appear to have been advertised together - once the Triplex was developed, the Duplex was apparently obsolete.

References:
How to Make Photographs and Descriptive Price List, The Scovill & Adams Co. (New York, NY), distributed by Sargent & Co. (Cleveland, OH), April 1891, pp. 68-69
How to Make Photographs and Descriptive Price List, The Scovill & Adams Co. (New York, NY), distributed by Horgan, Robey & Co. (Boston, MA), January 1892, p. 83
The International Annual of Anthony's Photographic Bulletin Vol. VII 1895,E. & H.T. Anthony & Co. (New York, NY), 1894, ads p. 88
Illustrated Catalogue of Photographic Equipments and Materials for Amateurs, E. & H.T. Anthony & Co. (New York, NY), December, 1895, p. 76
Catalogue of Photographic Apparatus, Rochester Optical Co. (Rochester, NY), May 1897, p. 53
Illustrated Catalogue of Photographic Equipments and Materials for Amateurs, E. & H.T. Anthony & Co. (New York, NY), February, 1898, p. 76
American Annual of Photography and Photographic Times Almanac for 1898, The Scovill & Adams Co. (New York, NY), 1897, ads p. 120
Catalogue No. IIII of Professional and Amateur Photographer's Supplies, Wm. F. Uhlman (St. Joseph, MO), c.1901, p. 22
 


 

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