Some fresh pics of this very rare Montblanc Villeret Minerva timepiece. I believe it is pretty unique because within the Retour a Zero watches it could be the only one with a central second hand doing this job. In fact we are talking about a chronograph center hands that is permanently running without minutes or hours subdials.
Model Seconde au Centre Retour à Zéro
Ident No. 104343
Movement:
Calibre: MB M13.18
Movement type: Manually wound retour à Zéro movement
Chronograph: -
Indications: Central hours - minutes and seconds - seconds hand with zero-reset function
Displays (Chronograph): -
Diameter: 29.50 mm
Height: 6.40 mm
Number of components: 196 components
Number of jewels: 21 jewels (hemispherical, cambered, olive-cut)
Power reserve: Approx. 55 hrs
Balance: Screw balance, Ø 11.40 mm; 26 mg.cm.
Frequency: 18,000 vibrations per hour (2.5 Hz)
Balance spring: With Phillips curve
Plate: Rhodium-plated German silver, circular-grained on both sides, hand-chamfered edges
Bridges: Rhodium-plated German silver, “Côtes de Genève”, recesses circular-grained on both sides, hand-chamfered edges
Going train: Wheels: gold-plated, circular-grained, chamfered, diamond hubs on both sides
Pinions: polished faces and toothing, burnished pivots
Case
Material: 18 K white gold
Bezel: -
Sapphire crystal: Cambered sapphire crystal
Case back: Screwed domed sapphire crystal case back, hinged cuvette with patented release mechanism
Crown: With Montblanc emblem in mother-of-pearl
Dial: Solid 18 K gold dial with hand-crafted silver-plated circular-grained decoration
Hands: 18 K gold, central second hand in Pfinodal ®
Horns: With patented cuvette release mechanism
Diameter: 41 mm
Height: 14.80 mm
Water resistant: 3 bar (30 m)
Strap
Material/Colour: Hand-stitched alligator-skin / Black
Clasp/Buckle: Pin buckle in 18 K white gold
Limitation: 8 pieces