Speedmaster MOONWATCH PROFESSIONAL CHRONOGRAPH 42 MM - Steel on Steel
Complicated watch with a function for measuring short time periods in addition to its function for permanently displaying hours, minutes and seconds.
A hand on a sub-dial which tracks seconds typically it completes a full rotation in one minute.
A tachymeter is an instrument for measuring speed. It is a chronograph with a graduated dial on which speed can be read off in kilometres per hour based on 1000 metres distance.
Transparent case backA transparent case back - frequently made of sapphire - makes it possible to see the movement inside the watch.
- Between lugs: 20 mm
- Bracelet: steel
- Case: Steel
- Case diameter: 42 mm
- Dial color: Black
- Crystal: Domed, scratch‑resistant sapphire crystal with anti‑reflective treatment inside
- Water resistance: 5 bar (50 metres / 167 feet)