Binocular microscope with body tubes separable by turning a single screw, by Nachet and Son, 17 rue St. Severin, Paris, France, 1850-1875. Binocular microscope with body tubes separable by turning a single screw 1850-1875
Triple bodied microscope attributed to C.D. Ahrens, English, 1860-1880 Triple bodied microscope attributed to C.D. Ahrens 1860-1880