A diamond-set 18ct yellow gold alarm watch by Mauboussin

A diamond-set 18ct yellow gold alarm watch by Mauboussin, model R21369, case number 103, the bezel set with two rows of round brilliant-cut diamonds, the signed dial with border of diamonds and rubies, with mother-of-pearl inner section and skeleton centre, swing seconds hand, tapered baguette-shaped diamonds at 3, 9 and 12, case 35mm, automatic self winding, plunge action alarm control button, skeleton back, signed Mauboussin, on leather band with Mauboussin buckle