Mahogany frame with brass index arm and fittings, brass stop for index arm. Inlaid ivory plate on the crossbar, missing from the back of the frame. No tangent screw; clamping screw on the back of the index arm. Three socket shades (red, green, one glass missing). Index glass adjustment by screw, horizon glasses by screws, and levers, wing nuts (both missing) and clamping screws (both missing). Sight vane with two pinholes and a swiveling shutter (missing); back sight vane with one pinhole. Threaded ivory pencil cap present, pencil missing. No box.
