Bausch & Lomb Optical Co. (Rochester, NY)

Volute Variation 2 - c. 1900



Notes: 

Volute Variation 1 has the speeds, left to right, in order of T  B  3  2  1   1/5  1/25  1/50  1/100  1/150 (exposures getting shorter).

Volute Variation 2 has the speeds, left to right,  in order of T  B  1/75  1/50  1/25  1/5    1 (exposures getting longer). 

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

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