Seamaster Planet Ocean 600M

43.5?mm, steel on steel

The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).

A bezel which can be turned clockwise or anti-clockwise. Rotating bezels can be used to time events, measure elapsed times, or read second or third time zones.

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 at the 3 or 6 o??clock position, or within a subdial at 9 o’clock.

A watch with an additional 24-hour hand or 24-hour disc. Particularly useful for wearers who wish to track the hours in two time zones.

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.)

Guaranteeing the Swiss industry??s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).

Self-locking crown, screwed into the tube of the case, used for highly water resistant divers’ watches.

Allows the hour hand to be easily adjusted to different time zones without stopping the watch.

A transparent caseback – frequently made of sapphire – makes it possible to see the movement inside the watch.