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 sub-stage accessories, a plano-concave mirror in good condition on an articulated arm. The stand has a reversed “Y" shaped foot. The microscope comes with a host of accessories including: a quadruple nosepiece changer, wheel of stops condenser, forceps, lieberkuhn, pair of eyepieces with top hat type shades, four objectives (2 inch, 1 ½ inch, 2/3 inch & 1/5 cover correction, and signed), specimen slides, ect. In addition, this microscope has a calibrated monocular tube for slide preparation work. Comes in the original clamshell case with brass handle, catches and working lock & key. A binocular brass microscope with some unusual features in a fitted “clamshell" type case. In Excellent condition.