Binocular microscope with divided objective, on extraordinary frame with pulleys and weights, invented by Prof. Aubert, signed by H. Westien, German, 1870-1890 Binocular microscope with divided objective 1870-1890
Twin demonstration microscope invented by James of Salford, English, 1850-1888 Twin demonstration microscope invented by James of Salford
Binocular microscope by Smith & Beck, Coleman Street, London, serial No. 851, circa 1855 Binocular microscope by Smith & Beck 1850-1860