English, C. 1870, signed to the back plate 'R & J Beck, 11091, London & Philadelphia', microscope on lacquered brass base, concave mirror, sliding stage, course focusing via rack and pinion, Wenham prism in brass drawer, binocular tubes with inter-ocular adjustment, with four objectives binocular eyepieces, polariser, other substage accessories, side reflector and large table bulls-eye condenser, case width 40cm