1917
        
        Marine chronometer, 2 day. Earnshaw's spring detent escapement with balance wheel with Poole's auxiliary and oversprung helical palladium spring. Silvered dial, subsidiary seconds at VI. Up-down hand at XII.
              
      
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Object Details
| ID: | ZAA0081 | 
|---|---|
| Collection: | Timekeeping | 
| Type: | Marine chronometer | 
| Display location: | Not on display | 
| Creator: | Isaac | 
| Date made: | 1893-1894; 1893-94 | 
| Credit: | National Maritime Museum, Greenwich, London | 
| Measurements: | Overall: 190 x 180 x 185 mm |