Microbiologists in the early twentieth century often favored the Bausch & Lomb model CBE binocular microscope, because the instrument was designed and specially equipped to assist in bacteriological research.

Equipped with dual oculars, the microscope is designed to provide relief from eyestrain during prolonged periods of observation and to compensate for the limited depth perception afforded by stereoscopic-like viewing. The addition of a mechanical stage enhances utilization of the instrument as a tool in routine and higher-level bacteriological investigations. Microscopists can smoothly translate specimen slides in both the x- and y-directions by turning a rack and pinion mechanism while simultaneously viewing the object. The large square stage also features measuring scales ruled in single millimeters accompanied by verniers. Objectives are easily interchangeable and can be secured three at a time to a revolving nosepiece.

A swivel joint adjoining the limb to the horseshoe base allows the microscopist to adjust the instrument for comfortable viewing. Focus is achieved by a rack mechanism that translates the body tube while holding the specimen stationary on the stage.

Bausch & Lomb has a rich history, dating back to 1876 when the company started selling microscopes. Today, vintage Bausch & Lomb microscopes continue to fascinate historians, hobbyists, collectors, and scientists who appreciate the quality and uniqueness of these optical instruments.

This circa 1920 Bausch & Lomb microscope is in excellent condition throughout and features quality optics and workmanship.