A blue dial, a 45.5mm steel case and a set of chronograph counters give this Tissot Seastar 1000 the feel of a proper sports instrument. It is built for people who like a watch with real presence, and who want to time everything from a dive to a lap at the track.

The dial is the highlight: a blue gradient that brightens toward the center and darkens at the edge, giving depth to an otherwise clean layout of index markers and Super-LumiNova hands. Behind it, a Swiss quartz chronograph measures to 1/10 of a second, with 30-minute totalizing, central chronograph seconds and both ADD and SPLIT functions, so you can accumulate times or capture an intermediate time while the chronograph keeps running.

Despite the chronograph, the case keeps the full diving spec: 300 meters, a screw-down crown and pushers, a screw-down back and a rotating bezel with aluminum ring. The quick-release steel bracelet has a diver extension for wear over a wetsuit.

Seastar 1000 Chronograph 45.5mm Blue, Ref. T120.417.11.041.01

• Case: 316L steel, 45.5mm by 12.82mm
• Bezel: anti-clockwise rotating, aluminum insert
• Dial: blue gradient, index markers, date
• Movement: Swiss quartz chronograph with 1/10-second and 30-minute counters, ADD and SPLIT
• Crystal: sapphire, anti-reflective on both sides
• Bracelet: quick-release steel, folding clasp with diver extension
• Lugs: 22mm; weight 180g
• Water resistance: 30 bar (300m)

Big, blue and ready to time anything.