Type 20 flyback chronograph in steel. Self-winding movement with date and subdial for the seconds. Balance spring in silicon. 30-minute counter. Bidirectional rotating bezel. Luminescent hands and hour-markers. Sapphire caseback. Water-resistant to 10 bar (100m). Diameter: 42mm. Available with two interchangeable straps: one in calfskin and another in NATO fabric. A rapid interchange system allows the wearer to easily and independently switch from one strap to another. Reference Number: 2057ST/92/3WU