IWC Aquatimer Chronograph

About This Watch

The IWC Aquatimer Chronograph IW329003 combines serious dive watch capability with a sophisticated flyback chronograph complication, creating one of the most capable diving chronographs in luxury watchmaking. The in-house caliber 89365 features a flyback mechanism that allows the chronograph to be reset and restarted with a single push, eliminating the three-step stop-reset-start process — a valuable feature for timing successive dive intervals or decompression stops. The 44mm stainless steel case with 300-meter water resistance provides genuine professional diving capability, while IWC's SafeDive internal rotating bezel system ensures safe elapsed-time tracking. The bezel is operated by an external crown at 2 o'clock, rotating through a mechanical coupling that only permits counterclockwise movement. The black dial features the hours and minutes totalizer combined at 12 o'clock, a distinctive IWC layout that maximizes dial space. With 68 hours of power reserve from the Pellaton-wound movement, the watch offers impressive autonomy between wearing sessions. The rubber strap with diver extension provides practical utility for over-wetsuit wear. While the Aquatimer collection has been somewhat overshadowed by IWC's Pilot and Portugieser families, the Chronograph remains one of the finest flyback diving chronographs available, offering genuine in-house movement technology in a thoroughly professional package.