This microscope was
manufactured by the Bausch & Lomb Optical Co.
specifically for the surgical/medical instrument
supplier Charles Lentz & Sons of Philadelphia
(est. 1866). It is similar to the Bausch & Lomb
Harvard model pictured on the right and here, but has the more
elaborate substage usually associated with the
Investigator model.
A 1895
advertisment for Charles Lentz &
Sons