Smith and Beck Binocular “Second Class or...
Smith and Beck Binocular “Second Class or Number 3” microscope circa 1853-54. This microscope has thumbwheel-controlled rack & pinion inter-ocular separation, rack & pinion main focus and thumbwheel micrometer fine focus, a Wenham prism, on a sliding shoe to allow monocular or binocular vision, and a square mechanical stage with rotating overstage. Beneath the stage is a socket for...