Santos-Dumont micro-rotor skeleton watch, large model, automatic mechanical movement 9629 MC. 18K yellow gold (750/1000) case, beaded 18K yellow gold (750/1000) crown set with a sapphire cabochon, golden-finish sword-shaped hands, sapphire crystal and caseback, bridges covered in beige lacquer. Semi-matte dark gray alligator leather strap with 18K yellow gold (750/1000) ardillon buckle. Second strap in semi-matte brown 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.