Tissot Seastar 1000 T120.210.11.041.00 Quartz Diver's 300m Watch

Tissot Seastar 1000 Quartz Diver

The Tissot Seastar 1000 is a unisex diver's watch built for serious underwater use. Its 316L stainless steel case and sapphire crystal with double-sided antireflective coating provide durability and legibility in demanding conditions. The quartz movement ensures reliable timekeeping without manual winding. It suits recreational and professional divers who need a robust, ISO-compliant instrument.

300m Water Resistance and Caliber ETA 955.412

Rated to 300 metres, the watch handles saturation diving and prolonged exposure to pressure. The screw-down crown and unidirectional rotating bezel secure the seal and track elapsed time safely. The ETA 955.412 calibre with three jewels powers hours, minutes, seconds and a date window. It runs out of utility for mixed-gas diving requiring helium valves or for users wanting mechanical movement prestige.

Quartz Precision and Sapphire Crystal Limits

The quartz regulator delivers superior daily accuracy compared with mechanical alternatives, requiring only periodic battery changes. Sapphire crystal resists scratches far better than mineral glass but can shatter under sharp impact. The antireflective coating improves underwater readability yet adds a surface layer that may show wear over years. The fixed 36.00 mm case thickness and integrated bracelet limit strap customisation options.