The IWC Aquatimer IW3548 was introduced in 2004, marking a return of the inner rotating bezel as also found on the original 1967 Aquatimer 812 AD. The stainless steel model has a water resistance of 1000 meters; the bolder titanium version is water resistant up to 2000 meters.Reference IW3545-07 has a stainless steel case and a rubber strap.
