Longines HydroConquest L3.781.4.06.9The khaki model features a ceramic bezel insert that matches the colour of the dial and ties together the fully modernized design and sporty silhouette. Mounted on a stainless steel or green rubber strap, the watch, which is available in two sizes (41 or 43 mm in diameter), is powered by a self winding mechanical movement (L888. 3 calibre). Longines' iconic HydroConquest collection meets the expectations of those who are drawn to the open sea.