OMEGA SEAMASTER RAILMASTER OMEGA CO‑AXIAL MASTER CHRONOMETER 40 MM - Steel on Steel
The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).
Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).
Self-locking crown, screwed into the tube of the case, used for highly water resistant divers' watches.
- Between lugs: 20 mm
- Bracelet: steel
- Case: Steel
- Case diameter: 40 mm
- Dial colour: Grey
- Crystal: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
- Water resistance: 15 bar (150 metres / 500 feet)
Power reserve: 55 hours
Type: Self winding