Bausch & Lomb Optical Co. (Rochester, NY)
Shutter, 1891-type, Brass - c. 1900
Notes: This is a
Bausch & Lomb 6½x8½" Plastigmat
(double anastigmat) lens in a 4" diameter brass Iris Diaphragm Shutter,
patent date 1891, ser. #20900.
Illustrated Catalogue of Photographic Equipments and
Materials for Amateurs, E. & H.T. Anthony & Co. (New York, NY),
Catalogue of Photographic Apparatus, Rochester
Optical Co. (Rochester, NY), May 1897, p. 52
Catalogue No. IIII of Professional and Amateur Photographer's Supplies, Wm.
F. Uhlman (St. Joseph, MO), c.1901, p. 21
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