A GOLD CASED KEYLESS FUSEE POCKET CHRONOMETER

細節
A GOLD CASED KEYLESS FUSEE POCKET CHRONOMETER
A.P. Walsh, No. 1986, circa 1875

The white enamel dial signed A.P. WALSH. LONDON, Roman hour numerals, recessed subsidiary seconds and up-and-down dials, blued steel hands, gilt half-frame keyless fusee movement, 18,000 count train, jewelled to the fusee, inscribed A.P. Walsh, London No. 1986, Earnshaw escapement, free-sprung cut bimetallic compensated balance with gold screws, duo-in-uno blued steel helical balance spring, spring foot detent with jewelled locking stone, open face gold case hallmarked London 1873, casemaker's mark HW for Henry Webb
50 mm. dial diam.

拍品專文

Arthur Paul Walsh, born 1815 died 1893, Frith Street, Soho. An eminent pocket chronometer maker who was reputed to have invented the duo-in-uno balance spring.