Elgin, Model 600, Two day Marine Chronometer, silvered arabic numeral dial with subsidiary up/down indicator and seconds dials and marked Elgin, U.S.A., No. 144, damascened nickel chain fusee movement with split bimetallic balance, spring detent

Elgin, Model 600, Two day Marine Chronometer, silvered arabic numeral dial with subsidiary up/down indicator and seconds dials and marked Elgin, U.S.A., No. 144, damascened nickel chain fusee movement with split bimetallic balance, spring detent escapement and helical hairspring., 14 Jewels, U.S. Navy, in a fully gimbaled brass bowl with screw bezel housed in a glazed, three-tier, mahogany box with maker's plate, with padded carrying box, chronometer box ht. 7 1/2 in, outer box 9.5" chronometer and boxes are original, virtually like new, very minor scuff on outer box. Padding is all intact. Ticks robustly. A recent note on the glass says the unit gains 11 seconds a day. Retains original Elgin care and handling guide (printed on paper), including signed certificate of rate for 1943