Prospex collection

Seiko Prospex: A vibrant story that exceeds even the wildest expectations of athletes and adventurers. Unique divers watches, dynamic pilot watches and specimens with a rotating compass ring. No wish remains unanswered. Timepieces with professional specifications to discover the world your way. On land, at sea and in the air. Experience Seiko technology.

Automatic movement

A mechanical watch automatically charges itself when worn by converting the wearer's arm and wrist movements into energy. Movement of the watch causes the mainspring of the watch to be wound. This spring is the energy source.

Caliber 4R36

The 4R36 Seiko caliber with day/date display is an automatic caliber. The watch charges during wear by converting arm and wrist movements of the wearer into energy. Movement of the watch causes the mainspring of the watch to be wound. This spring is the energy source. Hand winding is also possible. When the watch is fully charged, it has an energy reserve of approximately 41 hours. The tick number of this automatic is 21,600 per hour and the watch has 24 jewels. The 4R caliber is manufactured entirely in-house.