CHALLENGE case Tonneau-shaped, 53.70mm x 41mm x 13.35 mm

Materials Steel or Bronze Steel. Polished and satin-finished case, Cross of Saint Andrew.
Caseback Open with sapphire crystal.
Crystal Sapphire, none-reflecting coating 2 faces.
Water-resistance 100 meters

Screws Polished 5N Red gold, exclusive CVSTOS TECHNOLOGY pattern.
Crown Grain, screw decoration Cvstos. Screw-down, polished 5N Red Gold, Nitril insert.
Dial Arabic numbers. Exclusive CVSTOS TECHNOLOGY design. Sapphire, nonereflective coating.

Indexes 5N Red Gold, Super-Luminova treated.
Hands Pierced, 5N Gold and Super-Luminova treated.

Calibre Skeletonized. Automatic winding movement CVSTOS CVS350. Black rhodium treatment.
Functions Hour, minute, seconds in the center (date disc skeletonized).
Power-reserve 42 hours
Jewels 21
Frequency 28,800 vibrations per hour

Strap Alligator skin or quilted leather.
Buckle Folding clasp