Swiss gilt-metal and enamel triple calendar pocket watch Circa 1900

Gilt metal keyless lever pocket watch
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An unusual Swiss gilded metal and enamel open faced triple calendar keyless lever pocket watch with moon phases, circa 1900. The reverse with black enamel foliate decoration, a central blank cartouche, both bezels with a similar relief pattern, polished band, inset calendar adjuster pins and a hinged cuvette. Pale green translucent enamel dial with a sunburst effect, Roman hours within white enamel chapters, outer gilt minute dots, apertures for the date, month and day, a lunar display with a polychrome enamel scene of the moon over a bridge, some people on it and a boat, apertures for the moon and under the bridge a revolving stained disc displaying the lunar cycle. A frosted gilt movement, bar calibre, jewelled, straight-line lever escapement with compensation, cut and compensated bimetallic balance, blued steel overcoil hairspring, index regulator. Movement numbered.
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Diameter: 50 mm
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Signed: No name
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The case has some dents.