1851 Great Exhibition: Official Catalogue: Class X.: John Hutton
7. HUTTON, JOHN, 9 Lucas Place, Commercial Road East — Inventor and Manufacturer.
Lady's gold watch, with patent single compensation stud. Gold watch, and silver lever and silver hunting- watches, with the same improvement.
Clock, with patent compensation pendulum and barometric contrivance, to prevent the variation of rate arising from the changes in the density of the atmosphere.
Marine chronometer, with patent pneumatic auxiliary compensation, for obviating errors in extremes of temperatures; this is effected by means of a metallic thermometer, which varies the air space in which the balance oscillates.
Gold first class watch (called Hutton's patent lever chronometer).
Patent lever escapement, showing the parts separately. Silver pocket chronometer, with improved adjustments. Gold first class watch, with patent escapement and spiral spring.
Gold watch, with patent double compensation spring, stud and patent escapement; adapted for riding, etc.
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