Fine pocket chronometer by this most famous firm, with rare 'duo-in-uno' balance-spring.
Gold 'crystal' case hallmarked London 1895, casemaker JW (John Woodman, Clerkenwell). Half plate keyless movement supplied by Hammersley, jewelled to the 3rd with hard brass setting at the fusee and cap jewels on balance (diamond), escape and 4th wheel. Spring-detent escapement with original black-polished detent, the escape with safety train-locking screw. Top quality compensation balance with quarter timing nuts and duo-in-uno form of helical balance-spring. Perfect signed enamel dial, original blued-steel hands. 53 mm diameter.
The firm of M F Dent, London, one of the leading watch, chronometer and clock makers of the period - see the book on Edward John Dent and the various Dent firms by Vaudrey Mercer.
John Hammersley, Clerkenwell, later working in St Albans, a noted maker of chronometers who is known for his use of the duo-in-uno balance spring. He supplied many fine watches to Dent - see Mercer, both Vaudrey and Tony.
Case with nicely engraved 'AS' monogram and some wear to the bow, showing the watch has been worn. Otherwise a fine example of a desirable keyless English pocket chronometer cased in gold rather than the usual silver. Cleaned and guaranteed.
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