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.

Brown embossed dial, gold applied numerals with luminescent coating. Rose gold. Case diameter (10-4 o’clock): 40.8 mm. Height: 8.1 mm. Screw down crown. Water-resistant to 120 m. Sapphire crystal case back. Chocolate brown composite strap. Fold-over clasp. Date. Sweep seconds.

Date in an aperture. Sweep seconds. Diameter: 27 mm. Thickness: 3.3 mm. Number of parts: 212. Jewels: 30. Power reserve: min. 35 hours – max. 45 hours. Winding rotor: 21K gold central rotor. Balance: Gyromax^®. Frequency: 28,800 semi-oscillations/hour (4 Hz). Balance spring: Spiromax^®. Hallmark: Patek Philippe Seal.