These heavy prismatic binoculars have a brass body with bakelite eyepieces. Each eyepiece focusses independently and has a choice of two different eyepiece lenses (the larger marked '12x') that rotate into place. There are brass caps and sliding sun shades for the objective lenses. Between the two tubes there is a fitting for mounting the binoculars onto a stand using a catch mechanism controlled by a knob (now detached). They are of a type used on battleships.