An early live steam model of a Pendulous oscillating engine, 20th century, the twin vertical mahogany-lagged oscillating cylinders with piston rods...

An early live steam model of a Pendulous oscillating engine, 20th century, the twin vertical mahogany-lagged oscillating cylinders with piston rods driving the overhead crankshaft, which is supported by a pair of 'lamp-standard' style partly turned brass columns, the centrally-mounted flywheel is grooved for belt-drive, with two further stepped p.t.o. pulleys, finished in patinated brass with red flywheel spokes, flat sheet brass bedplate fixed to a mahogany plinth, 17½in (44cm) wide.