A model triple expansion vertical reversing condensing marine engine, well engineered by P.E.B. Salvesen with blued steel clad bronze cylinders 7/8, 1¼ and 1¾in. bores x 1¼in. stroke, cylinder head pressure relief valves, drain valves and pipes, I.P. valve spindle tail shaft guide, main stop valve, hand wheel and worm gear operated Stephenson's link reverse, frame incorporated slipper type crosshead guides, LP crosshead driven air and twin feed pumps, six main bearings and disc flywheel, rear frame mounted condensor and pipework, finished in green and polished brightwork, cast bed and wood plinth -- 11¾ x 12¼in. (30 x 31cm.)