Blancpain Villeret Running Equation Ref. 6638-3431-55B
Movement: automatic-winding 3863 caliber; Ø 26.8mm, thickness: 5.25mm; 72-hour power reserve; 397 components; 39 jewels.
Functions: hours, minutes; small seconds; perpetual calendar: day at 9, date at 3 and month at 12; retrograde moonphase.
Case: platinum; Ø 42mm, thickness: 11.5mm; under-lug correctors; sapphire crystal caseback; water resistant to 3atm.
Dial: white Grand Feu enamel.
Strap: black alligator leather.
Price: available upon request.
Note: limited edition of 88 pieces.
Also available: red gold with brown leather strap (ref. 6638-