Probably manufactured by The London Nameplate Mfg. Co. Ltd. Stores reference 6B/180. Metal/bakelite I.C.A.N. computer with a hinged lid and 'markable' rolling graph with a rotating bezel. The lid has rotating metal discs to calculate airspeed and height corrections. This example is fitted with leg straps for use away from a Navigator's table. The pencil slot at the side of the casing is heavily chipped but otherwise in good used condition. It belonged to a wartime Warrant Officer pilot. Stock code M27060.