CHALLENGE Tonneau-shaped, 53.70mm X 41mm
CHALLENGE GT Tonneau-shaped case 59mm x 45mm
Materials: Steel, Blue, black, brown Steel with Red Gold 5N components or Bicolor 5N Pink gold.
Caseback: Open with sapphire crystal.
Calibre: CVSTOS 6511 GMT
Power-reserve: 42 hours
Functions: Hour, minute, seconds. Second time zone with 24 hour indication. Day/night indicator. Large date.