Jules Jürgensen, Copenhagen, Movement No. 6765, Case No. 6763, 53 mm, 123 g, circa 1850

An extremely rare pocket chronometer with pivoted detent escapement
Case: 18k gold, engine-turned, reeded band, numbered and signed gold dome, case maker's punch mark "ACJ". Dial: enamel, radial Roman hours, auxiliary seconds, blued Breguet hands. Movm.: bridge movement, frosted, gilt, pivoted detent chronometer escapement, large gold screw compensation balance.