IWC Schaffhausen launched its first dedicated dive watch in 1967, the ref. 812 AD Aquatimer, with a 36mm steel case, an internal rotating bezel operated via a second crown at 4 o'clock, and a 200m water-resistance rating. The internal-bezel system was a deliberate design choice to differentiate from the Submariner-style external bezel that had become the dive-watch standard: an external bezel can be knocked accidentally during use, while an internal bezel (operated via crown) cannot. The 1967 ref. 812 had a black dial, large luminous indices, and the IWC fish logo at 6 o'clock.
The 1980s and 1990s saw multiple Aquatimer references with varying bezel systems. The ref. 3536 (1997) used a conventional external rotating bezel; the ref. 3548 (2004) returned to an internal rotating bezel via crown. The 2014 redesign by IWC creative director Christian Knoop introduced the SafeDive system: an external rotating ring on the case bezel that is mechanically coupled to an internal rotating bezel ring. The wearer rotates the external ring (intuitive), but the actual dive-time mark advances on the internal ring (protected from accidental knocks). The system was patented and remains unique to the modern Aquatimer.
The 2014 generation also introduced a quick-change strap system (push-button release for the strap, no tools needed) and a redesigned 42mm case with bolder lugs and a more aggressive bezel-ring geometry. Movement was the IWC Cal. 30110 automatic (later refined to Cal. 80110 with Pellaton-pawl winding system, 42-hour power reserve, COSC chronometer specification on selected references). Water resistance is 300m standard; the Aquatimer Deep Three reaches 100 bar (1,000m) and includes a mechanical depth gauge.
The Aquatimer has carried multiple themed limited editions through its 60-year run: the Cousteau Divers editions (named after Jacques Cousteau, often with red detail and orange depth-gauge accents), the Galapagos editions (with blackened steel cases honouring the Galapagos Islands conservation programme), the Mercury chronograph editions, and various IWC-supported environmental NGO editions. Current Aquatimer retail spans approximately USD 6,300 (42mm steel automatic) to USD 30,000+ (Deep Three depth gauge). Production volumes are mid-range for IWC; the Aquatimer is not the brand's biggest-selling line but remains one of its most distinctively engineered.
