H.H. Heinrich Two-day Marine Chronometer No. 507

H. H. Heinrich Two-day Marine Chronometer, No. 507, New York, c. 1880, 4-in., silvered, twenty-four-hour, Arabic numeral dial marked with subsidiary seconds and up/down sector, marked H.H. Heinrich , New York , No. 507 , chain fusee movement with spring detent escapement, maintaining power, split bi-metallic balance, helical balance spring, in a fully gimbaled brass bowl with screw bezel, two-tier, brass-bound, rosewood box with inset brass carrying handles, serial number and maker's plate, ht. 7 1/2 with green-felt lined mahogany transport box, ht. 7 1/2, wd. 7, dp. 7 in.