Bausch & Lomb Optical Co. (Rochester, NY)

Iris Diaphragm Shutter, 1891-type, Brass - c. 1896

 

3" dia. brass Iris Diaphragm Shutter marked: "Bausch & Lomb Optical Co. Pat. Jan 6, 1891  2507"

 

3" dia. brass Iris Diaphragm Shutter marked "Bausch & Lomb Optical Co. Pat. Jan. 6, 1891  2507"

3" dia. brass Iris Diaphragm Shutter marked "Bausch & Lomb Optical Co. Pat. Jan. 6, 1891  2852"


Notes:  This is an unmarked rapid rectilinear-type lens in a 3" diameter brass Iris Diaphragm Shutter, patent date of 1891, ser. #2852.

References:
Illustrated Catalogue of Photographic Equipments and Materials for Amateurs, E. & H.T. Anthony & Co. (New York, NY), December, 1895, p. 77
Illustrated Catalogue of Photographic Equipments and Materials for Amateurs, E. & H.T. Anthony & Co. (New York, NY), February, 1898, p. 73
 

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