Brand: Fortis Model: B-42 Flieger Chronograph Reference family: 635.10.12 / 635 series Movement: Automatic chronograph Calibre: ETA/Valjoux 7750 Case: Stainless steel Diameter: 42 mm Thickness: Approx. 15 mm Dial: White/silver Hands: Distinctive blue hands Crystal: Sapphire Caseback: Exhibition/display back Water resistance: 20 ATM / 200 metres when originally specified Bracelet: Stainless-steel Fortis bracelet with signed folding clasp 17.5 with watch fully Functions: Hours, minutes, small seconds, chronograph, day and date Tachymeter: Yes Swiss Made: Yes