Diagram Boards: Westinghouse Brakes, large tri-coloured diagrams (2) of the 81/2 inch & 7 inch cross compound air compressors, c1953, mounted on masonite, each about 99 x 68 cm. Plus Nathan Non-Lifting Injector, diagrams (3) mounted on plyboard, each 72 x 71 cm. Fair/Good condition. (5 items)