Charming Bird

Sapphire dial.
18-carat white gold case.
Singing bird automaton movement, hand-winding mechanical movement and push-button automaton triggering mechanism.
Self-winding mechanical movement.
Sapphire whistle system.
Power reserve of 38 hours.
Diameter 47 mm.
Numerus Clausus of 28.

Technical Data
Reference: J031534240
Movement: Jaquet Droz 615, self-winding mechanical movement, single barrel. Balance wheel with regulator screw and silicon spring. Platinum oscillating weight
Indications: Singing bird action
15 jewels
Off-centered hours and minutes
Jewelling: 29 jewels
Power reserve: 38 hours
Frequency: 21,600 v.p.h
Case: 18-carat white gold case
Height 1: 15.75 mm
Height 2: 23 mm
Individual limited serial number engraved on the case-back
Diameter: 47 mm
Water resistance: No
Dial: Sapphire crystal dial with platinum Roman numerals
Hands: Blued stainless steel
Strap: Rolled-edge hand-made black alligator leather strap with black alligator leather lining and black stitches
Buckle: 18-carat white gold prestige folding clasp
Numerus clausus: 28
Complications: Automata