Swiss silver open faced calendar cylinder watch Circa 1880

Calendar pocket watch
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A rare and unusual Swiss silver open faced calendar keyless cylinder watch, circa 1880. Gilt finished cylinder movement. Silver cuvette.
White enamel dial with Roman numerals, outer Arabic five-minute divisions, decorative gilt hands, three subsidiary dials for date, month and day. Scroll and floral engraved bezel, band and back. Very rare small buttons in the band to equalize the date, month and day.
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Diameter: 38 mm
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Weight: 47 g
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Signed: No name
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Reference 04000