31 automatic movement that can be admired through a sapphire crystal case back
The manually wound mechanical movement Calibre 822 draws on a 42-hour power reserve
Case thickness: 10
7-sided crown with synthetic faceted blue spinel
non-screw crown with 1 o-ring and mother-of-pearl Montblanc emblem
SANTOS-DUMONT SKELETON Serial Number:4466481203EY 31 automatic movement that canSantos Dumont micro rotor skeleton watch, large model, 31x 43. 5 mm, automatic mechanical movement, 9629 MC. Steel case, polished blued steel sword shaped hands, sapphire crystal and case back, bridges covered in gray lacquer. Gray alligator skin strap and blue alligator skin strap, steel ardillon buckle. Movement dimensions: 23. 2 mm, movement thickness: 4. 4 mm, balance: 25,200 vibrations hour, power reserve approx. 46 hours. Case dimensions: 31 x