Swap the steel bracelet for black rubber and the Tissot Seastar 1000 Chronograph becomes a lighter, more casual watch, without losing any of its diving or timing ability. With its blue gradient dial, this version is a favorite for people who want a chronograph they can genuinely take into the water.

At 109 grams it weighs far less than the bracelet model, and the rubber strap is comfortable in heat and humidity. The dial shades from bright to deep blue, framed by an anti-clockwise rotating bezel with aluminum ring, and Super-LumiNova on the hands and markers keeps it readable in murky conditions. The Swiss quartz chronograph handles 1/10-second timing, 30-minute totals and ADD and SPLIT modes, and screw-down pushers let you use it safely below the surface.

It is the Seastar chronograph to pack for vacations, sailing trips and summer weekends, when a steel bracelet would just get in the way.

Seastar 1000 Chrono on Rubber: Blue Dial, Ref. T120.417.17.041.00

• Case: 45.5mm in 316L steel, 12.82mm high
• Dial: blue gradient, index markers, date
• Bezel: unidirectional, aluminum ring
• Movement: Swiss quartz chronograph with ADD and SPLIT
• Crystal: sapphire, anti-reflective inside and out
• Strap: black rubber with pin buckle, 22mm lug width
• Weight: 109g
• Water resistance: 300m (1,000 ft)

Lighter, more relaxed and still ready for deep water.