A lacquered brass monocular microscope, signed E. Hartnack & A. Prazmowski Rue Bonapartes 1 Paris, with rack and pinion focusing, fine focusing screw, detachable adjustable bullseye to body tube, square stage, knuckle joint to limb, plano-concave mirror with swing arm, on 'Y' shaped foot in fitted mahogany case with accessories - 11in. (28cm.) wide.