The IWC Aquatimer IW3548 made its debut in 2004, bringing back the iconic rotating bezel design first seen on the 1967 Aquatimer 812 AD. With a stainless steel case, this watch can withstand depths of up to 1000 meters. For those looking for even more durability, the titanium version can go down to 2000 meters. The reference IW3545-07 features a stainless steel case and a comfortable rubber strap.