| An early 20th Century American lever marine box chronometer with keep case. Nickelled three quarter plate keyless movement with two going barrels for eight day operation. Plain cock with polished steel micrometer regulator, compensation balance with blue steel overcoil hairspring. Club
foot lever escapement. Signed silvered dial with subsidiaries for seconds and power reserve, Roman numerals, blue steel hands. Turned brass bowl engraved US Navy No 175, screw brass bezel with flat glass. Brass gimbals and locking mechanism, wound by a broad flat crown at 12 o'clock. Three tier brass bound mahogany box, rectangular brass plate engraved "Waltham". Outer mahogany keep case lined with green baize.
Accompanied by a US Navy Department Bureau of Ships record dated December 1943 showing the chronometer is losing 2 and 35/100 of a second each day.
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