Willeumier a Paris

Willeumier a Paris, No. 10647, circa 1790. Fine and rare silver 24-hour day-and-night watch with date and age of the moon. Two-body, polished. Enamel, white top with black Breguet numerals from 6 AM to 6 PM, 31-day subsidiary date dial below 12 o’clock, lower part in black enamel with white Breguet numerals from 6 PM to 6 AM and subsidiary moon age dial above midnight. Gold crescent hands. 48 mm, hinged, frosted gilt full-plate with pentagonal baluster pillars, fusee and chain, verge escapement brass balance with flat balance spring, continental cock.Signed on dial and movement.Diam. 59 mm