VANGUARD Tourbillon VAN-M138 Obsidian
Detailed Technical Dossier & Craftsmanship
Valjoux 7750 Chronometer
High-accuracy regulation adjusted in 5 positions. Tested under chronometric ISO 3159 standards.
44 MM Diameter
Multi-piece satin-brushed chassis with hand-polished chamfers and anti-reflective sapphire crystal.
Obsidian Black Tachymeter
Sunburst brushed surface with diamond-cut indices and Swiss Super-LumiNova luminescence.
Louisiana Alligator Leather
Ergonomically contoured with micro-adjust folding security clasp bearing the Sereno emblem.
20 ATM (100 Meters / 330 FT)
Double O-ring screw-down crown system preventing ingress of moisture and dust particles.
Geneva Precision Standard
Individual certificate of authenticity and laser-engraved serial number on exhibition caseback.
Complementary Timepieces
Voices of Distinction
"The finishing on the bezel and bevelled lugs rivals Swiss houses charging five times the price."
Julian Laurent
Verified Collector"Superb weight distribution. The bracelet articulates flawlessly around a 7-inch wrist."
Elena Rostova
Verified Collector"Accuracy has remained within +2 seconds/day on my timegrapher over 3 weeks."
