Bausch & Lomb Optical Company, Rochester, New York     1915-1920

Primary projection lens for the Cosmograph portable 35mm motion picture projector.

The lens was manufactured by Bausch & Lomb for the Maggard-Bradley Company, which had been manufacturing motion picture machines as early as 1903.  Maggard-Bradley's factory was located in Morehead, Kentucky, their name being changed to the Cosmograph Sales Company by January, 1918.

This Cosmograph lens probably dates to the 1915-1920 era.