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SIGNED JN ARNOLD, LONDON, INVT. ET FECIT, NO. 41/342, CIRCA 1783
细节
Arnold. A silver cased pocket chronometer with up and down indication
Signed Jn Arnold, London, Invt. et fecit, No. 41/342, circa 1783
The frosted gilt chain fusee movement with engraved and pierced cock, diamond endstone, gold helical spiral, Arnold's three-armed OZ balance with threaded weights, Arnold's spring detent escapement with jewelled locking pin, the later white enamel dial with Roman numerals, recessed subsidiary seconds, subsidiary dials for up and down indication, blued steel hands, in later silver case, with associated mahogany three-tier observation box, dial signed, movement signed and numbered
49 mm. diam. dial
Signed Jn Arnold, London, Invt. et fecit, No. 41/342, circa 1783
The frosted gilt chain fusee movement with engraved and pierced cock, diamond endstone, gold helical spiral, Arnold's three-armed OZ balance with threaded weights, Arnold's spring detent escapement with jewelled locking pin, the later white enamel dial with Roman numerals, recessed subsidiary seconds, subsidiary dials for up and down indication, blued steel hands, in later silver case, with associated mahogany three-tier observation box, dial signed, movement signed and numbered
49 mm. diam. dial
出版
Hans Staeger, 100 Years of Precision Timekeepers from John Arnold to Arnold & Frodsham 1763-1862, 1997, pp. 161 and 162