Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).
The day of the month, displayed in a window on a watch dial typically at the 3 o'clock or 6 o'clock position.
Helium escape valve Helium escape valve
Decompression system which allows helium to escape from inside the watch when the watch is worn for professional use in pressure chambers. (Long-term underwater work, crude oil exploration, etc.)
Screw-in crown Screw-in crown
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: 41 mm
- Dial colour: Blue
- Crystal: Domed anti‑reflective, scratch‑resistant sapphire crystal
- Water resistance: 30 bar (300 metres / 1000 feet)
- Calibre: OMEGA 1120
- Self‑winding chronometer with rhodium‑plated finish.
- Power reserve: 44 hours
- Type: Self winding
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