JULES JURGENSEN
DETENT POCKET WATCH SILVER
Jules Jurgensen silver deck Chronometer Copenhagen
Jn. Arnold, London, Invenit et Fecit, No. 35, circa 1800.
Very fine and rare silver spring detent pocket chronometer.
Three-body, polished.
White enamel, radial Roman numerals, outer minute
track, subsidiary seconds. Blued steel "spade" hands.
42 mm. hinged, frosted gilt brass full plate, cylindrical
pillars, spring detent escapement with detent set in a slot
cut in the back plate, cut bimetallic compensation balance
with outer temperature screws and inner mean time nuts,
blued steel free-sprung helical balance spring with outer
terminal curves, English cock with diamond endstone, the
unlocking roller set above the impulse roller.