[javascript protected email address]
[javascript protected email address]
Circa 1857
Sold
164mm. square box
A fine mahogany two-day marine chronometer. DIAL The 87mm. silvered engraved brass dial has Roman chapters with outer minute track, gold spade hands. The centre is signed Delolme Rathbone Place London No. 850 with up-and-down sector at XII calibrated 0-56, seconds ring at V, both with blued steel hands. MOVEMENT The full-plate movement has well spotted plates with four ring-turned pillars with blued steel screws at the top plate, chain fusee and spring barrel, the escapement with cut bimetallic balance with circular heat compensation weights, blued steel helical balance spring and Earnshaw-type spring detent escapement with jewelled locking stone. BOX Dent-style bayonet-fixed sprung brass movement cover, brass bowl with spring-loaded winding cover, gimbal with sprung receiver for the bowl locking arm. Unusual Continental-style three-tier mahogany box with spring-loaded top lid set with a lozenge brass plaque, double-throw lock, original tipsy winding key punch-numbered 850.