Patek Philippe Aquanaut watches

The Patek Philippe Aquanaut is the brand's sporty, casual line, first shown in 1997 as the 5060A. Its rounded octagonal bezel recalls the Nautilus, the case mixes polished and satin-brushed surfaces, and the embossed checkerboard pattern of the dial carries on into the strap. That strap is a composite, made to resist wear, salt water and UV light.

The 5167A is the steel time-and-date Aquanaut: 8.1 mm thick, water-resistant to 30 m, with the self-winding calibre 26-330 S C and its 21K gold central rotor. The 5167R is the same watch in rose gold, and the 5167A-012 Singapore 2019 is a run of 500. The 5168G moves up to a 42.2 mm white gold case on the same calibre; the 5168G-010 pairs a khaki green dial with a khaki green strap.

The Travel Time 5164 adds a second time zone, and the 5650G Advanced Research is a white gold Aquanaut Travel Time made in 500 pieces. The 5968 is the chronograph: a 42.2 mm case, 11.9 mm thick, around the self-winding CH 28-520 C, a flyback with a vertical clutch, a central chronograph hand and a 60-minute counter at 6 o'clock. The steel 5968A has orange chronograph markings and comes with an extra orange strap.

The Aquanaut Luce, added in 2004, takes its name from the Italian for light and sets diamonds into the bezel. The 35.6 mm 5067A in steel and 5068R in rose gold carry gem-set bezels, and the line extends to Haute Joaillerie versions such as the 5072R, with a pink mother-of-pearl dial, and the 5062/450R. The 38.8 mm Luce 5267/200A runs on the quartz calibre E23-250 S C with 48 diamonds on the bezel, while the rose gold 5268/200R is self-winding and the 5269/200R is a Luce Travel Time.