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        Pocket chronometer movement with dial and hands. Full-plate fusee movement, signed and numbered, with Arnold spring detent escapement and steel ‘OZ’ balance with helical spring. 
The movement has a white enamel dial with Roman numerals and steel open-heart hands, with a subsidiary seconds dial below centre with a steel hand.
      
    The movement has a white enamel dial with Roman numerals and steel open-heart hands, with a subsidiary seconds dial below centre with a steel hand.
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Object Details
| ID: | ZAA0310 | 
|---|---|
| Collection: | Timekeeping | 
| Type: | Pocket chronometer movement | 
| Display location: | Not on display | 
| Creator: | John Arnold & Son | 
| Date made: | circa 1785 | 
| Credit: | National Maritime Museum, Greenwich, London, Foulkes Collection | 
| Measurements: | Overall: 49 x 47 x 18 mm | 
