English lever deck watch in a silver open face case Circa 1915

Silver deck watch by Usher & Cole
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A rare English Royal Navy deck chronometer, circa 1915. This pocket watch boasts a heavy silver case with London Hallmarks from 1915. It is equipped with a precision lever movement and bears military Royal Navy markings. The watch is signed and numbered No. 31431. The original enamel dial is also signed and numbered, featuring military Royal Navy markings, a centre seconds hand, Roman radial hours, and an outer minutes/seconds track with Arabic numerals for five-minute/second intervals. The hands are made of steel.
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Diameter: 56 mm
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Weight: 164 g
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Signed: Usher & Cole London