£60
Two Sterling Horizontal Cylinder Hot Air Engines, a very good example, 15mm stroke, twin 5cm flywheels, burner, brass/bright metal construction overall dimension 10 x 17 x 16cm, mounted to a wood base, the other 15cm Pyrex tube, 9cm diameter flywheel, burner, overall dimension 10 x 25cm by 14cm high, constructed/finished in bright metal/brass.
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