A grey enamelled "DIAMEX binocular microscope by Beck in case; a black enamelled and chrome binocular microscope by EITZ WETZLAR No541461; an associated illuminating unit; William B Carpenter The Microscope and its Revelations 1891; R.G.Hebb Journal of the Royal Microscopical Society 1913Jabez Hogg The Microscope 1911 (6)