John Nixon did have a similar, if not identical instrument with a hot air engine.
It was sold at John's auction last November with a Rentokill woodworm certificate!
File comment: The instrument in John Nixon's collection...complete with lots of woodworm holes!
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File comment: A close up of the gearing
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File comment: The hot air engine
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File comment: One of only 4 or 5 books of music
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