A MAHOGANY TWO DAY MARINE CHRONOMETER, NO. 830, ENGLISH, JAMES MURRAY, ROYAL EXCHANGE, CIRCA 1830-1840

12cm silvered dial with subsidary seconds and up/down dials, fusee movement with maintaining power, Earnshaw's spring detent escapement with compensation balance and helical spring, the brass bowl gimbal-mounted in a mahogany case with swing handles, blued steel hands, signed movement and dial



case 16.5cm square