Swiss gold open faced minute repeating watch Circa 1920

Gold and enamel repeating lever with mother-of-pearl dial by F.W. Eisenhart
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A Swiss 18 carat gold, enamel and mother-of pearl open faced minute repeating keyless lever watch, circa 1920. Nickel finished lever movement, 27 jewels, minute repeating on two gongs activated by a slide in the band. Mother-of-pearl dial, applied Breguet numerals and subsidiary seconds. Polished case with the bezels engraved with scrollwork and highlighted by black and blue enamel. Case, dial and movement signed.
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Diameter: 47 mm
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Signed: F.W. Eisenhart Swiss