Bausch & Lomb Investigator microscope – circa 1893

The Investigator model was patented by Bausch & Lomb in 1876, and produced into the 1890’s.  This model has a triple nosepiece with three original Bausch & Lomb lenses, a ½”, Ό”, and 1/8” – all with matching, signed Bausch & Lomb brass canisters.  There are two original eyepieces.  The optical system produces very clear, sharp images of good contrast.  Coarse focus is rack and pinion, fine focus with micrometer knob.  The substage has a wheel of stops and a plano-concave mirror in very good condition, noting age wear along the edges.  The rotating circular stage has an accessory glass cover.  The original finish of the microscope lacquered brass with a painted base.  The coverage is complete with typical age wear.  The instrument is 12 ½” tall when fully closed.  It is signed on the stage, “Bausch & Lomb Optical Co.”  The original finish is lacquered brass with a gold painted base.  Coverage is complete with typical age wear.  The original pine case with paneled door and brass carry handle, is in very fine usable condition with lock but no key, replacement latch, and interior accessory drawer.   The Investigator, Universal, and Professional models preceded the Bausch & Lomb Continental design, and are much less common, especially in fine condition.  This particular example has an impressive optical system and is in very fine condition overall.

Item 1398