Unusual Swiss 18k gold minute repeating watch Circa 1910

Small gold open-faced minute repeating watch
–
A small and unusual 18k gold open-faced minute repeating keyless lever watch, circa 1910, nickel damascened lever movement, cut bimetallic balance, swan neck regulator, jewelled to the centre, adjusted, two hammers for the striking mechanism repeating on gongs, gold cuvette.
White enamel dial, Arabic numerals for hour and five minute indication, outer track graduation, subsidiary seconds, gold case, back with initials, sliding device on the band to activate the repeating mechanism, dial and movement signed.
–
Diameter: 32.5 mm
–
Signed: Wittnauer & Cie Genève