Tissot T120.407.17.041.00 Seastar 1000 Powermatic 80 watch 43 mm

Seastar 1000 Powermatic 80 43 mm

The Tissot Seastar 1000 Powermatic 80 is a Swiss automatic dive watch built around a 43 mm 316L stainless steel case. A blue dial with dotted markers pairs with a rubber strap and buckle clasp. The movement delivers an 80-hour power reserve and the case is rated to 300 metres water resistance with a unidirectional bezel and screw-down crown.

Serious divers and daily wearers

Suits buyers who want a certified diver with long power reserve and robust 316L construction for swimming or desk duty. Not for shoppers needing a chronograph complication, GMT hand or integrated metal bracelet. The rubber strap and 43 mm diameter may feel large on slender wrists.

Straightforward strap swap

The rubber band uses standard spring bars so a spring-bar tool lets you change straps in minutes. Ensure the crown is fully screwed down before water exposure; forgetting this is the most common cause of moisture ingress. Avoid over-tightening the case back during battery-less service to protect the gasket seal.