The Aquatimer Chronograph is equipped with the IWC-manufactured 8900 calibre, IWC's first chronograph movement with a flyback function, which enables the chronograph to be stopped and restarted at the push of a button. This function can also be used when diving, for instance to control the ascent rate, which must never exceed 10 metres per minute. Like all Aquatimer models, the watch is equipped with a quick-change system for the rubber strap, which can be conveniently replaced with a hook-and-loop strap without the need for any tools.
Below is the data sheet.
Case: 5N red gold (44 mm).
Bezel: internal, unidirectional, with sapphire crystal ring.
Crown: screw-locked.
Buttons: round.
Glass: anti-reflective sapphire.
Back: screw-down with sapphire crystal.
Water resistance: 12 atmospheres.
Dial: black, luminescent bar hour markers, luminescent baton hands, chrono hours and chrono minutes on mono-counter at 12 o'clock, continuous seconds and date window at 6 o'clock, chrono seconds in centre.
Movement: mechanical self-winding, 8900 calibre with flyback function.
Strap: rubber.
Price: 20,000 euro.
