細節
A Victorian rosewood two-day marine chronometer with auxiliary compensation
William Crisp, London No.3161. Circa 1865
The engraved and silvered Roman dial signed WILLM. B. CRISP, MAKER TO THE ROYAL NAVY, 21 LONDON ST. MARK LANE, LONDON, NO.3161, subsidiary up/down ring (0-56) beneath XII, seconds ring at VI engraved and filled in red and green AUXILIARY COMPENSATION PRIZE MEDAL - 1862, hour, minute and up/down hands in gold, blued steel seconds hand, the movement with circular spotted brass plates with four ringed pillars, chain fusee and spring barrel, Earnshaw-type spring detent escapement with jewelled locking stone, blued steel helical spring, cut bimetallic balance with circular heat compensation weights and Crisp's auxiliary compensation device, brass bowl stamped 3161, the brass-bound case with recessed handles to the sides, the mid section now lacking the circular signature plate and the top lid now lacking
105mm. dial diameter; 180mm. square box