IWC Aquatimer Automatic Chronograph Black Dial Black Rubber Strap Watch for Men - IW376709The Aquatimer Chronograph comes with two impressive features: first, the highly functional Aquatimer family design, developed for diving; and second, the additional benefit of a self winding mechanical chronograph. Thanks to its high level functionality, the newly developed rotating outer bezel with its inset sapphire glass ring is particularly easy to use. It can be turned easily with or without gloves before the dive and snaps reliably into place.