Challenge Gustave Eiffel
Case: Tonneau-shaped
CHALLENGE 53.70mm X 41mm X 13.35mm
Materials: Steel or Bronze Steel
Caseback: Open with sapphire crystal, none-reflecting coating
Calibre: Skeletonized. Automatic winding movement CVSTOS CVS350
Power-reserve: 42 hours
Jewels: 21
Functions: Hour, minute, seconds in the center (date disc skeletonized)
Swiss made