Santos-Dumont skeleton watch equipped with a micro-rotor WHSA0044

Santos-Dumont micro-rotor skeleton watch, large model, automatic mechanical movement 9629 MC. Steel case with black lacquer, beaded steel crown set with a sapphire cabochon, blued-steel sword-shaped hands, sapphire crystal and caseback, bridges covered in black lacquer. Black alligator leather strap with steel ardillon buckle. Second strap in dark gray alligator leather. Case dimensions: 43.5 mm x 31.4 mm, thickness: 8 mm. Movement dimensions: 23.2 mm, movement thickness: 4.4 mm, balance: 28,800 vibrations/hour, power reserve approx. 44 hours. Water-resistant up to 3 bar (approx. 30 meters/100 feet).