RAF Poster. Ref. 10U/13313, 'Diagrammatic Layout of Claudel Hobson Carburettor. (As used in the Rolls Royce Eagle aero engine c. 1920s onwards). Thick paper poster, approx. 96 x 66cm. Full colour illustration of the carburettor. Impressive display item. Marked 'RAF - For Official Use Only'. I believe this model was used in the Hawker Typhoon. Overall appearance is good but there is some light soiling & creasing plus smallish edge tears and relatively minor damage. Stock code P13862.