When launched in 1997, the Aquanaut created a sensation. It was young, modern and unexpected. Its case was a rounded octagon, inspired by that of the Nautilus. And it sported a “tropical” strap, made of a new composite material ultra-resistant to wear, salt water and uv radiation.

Black embossed dial. Steel. Case diameter (10-4 o'clock): 40.8 mm. Height: 10.2 mm. Screw-down crown. Water-resistant to 120 m. Sapphire crystal case back. Black polymer material. Aquanaut fold-over clasp. Aquanaut Travel Time. Dual time zone mechanism indicating local and home time. Local and home day/night indications in apertures. Local date by hand. Sweep seconds hand. Gold applied hour markers with luminescent coating.

Diameter: 31 mm. Thickness: 4.82 mm. Number of parts: 290. Jewels: 29. Power reserve: Min. 35 hours - max. 45 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax^®. Vibrations/hour: 28 800 (4 Hz). Balance spring: Spiromax^®. Hallmark: Patek Philippe Seal.