Allowing you to dive to great depths, the new Hamilton Khaki Navy Scuba has increased water resistance to 300 metres (30 atmospheres). The steel case, larger than in the past (43 mm), is surmounted by a bezel with a black ceramic ring, resistant to scratches and corrosion, and a SuperLuminova dot at 12 o'clock that allows the dive time to be measured. It houses a self-winding mechanical movement, calibre H-10, with an 80-hour power reserve and a balance spring made of Nivachron, an innovative alloy that resists both magnetic fields and temperature variations, guaranteeing stability and precision. There is a choice of a black rubber strap to match the colour of the dial or a steel bracelet. A version with a blue dial and tone-on-tone ceramic bezel is also available, also with a steel bracelet. Price: 945 euros.