The New Longines Ultra-Chron Is Inspired By The Aesthetics Codes As Well As The Professional Dive Features Of The 1968 Model. It Features A Unidirectional Rotating Bezel As Well As A Screwed In Caseback And Crown. It Also Offers Great Legibility And Is Water Resistant To 30 Bar (300 Meters). With Centuries Of Watchmaking Expertise, Longines Has Played A Pioneering Role In A Number Of Technological Advances And Continues To Display An Unwavering Commitment To Innovation. Its Constant Pursuit Of Excellence Has, In Turn, Led It To Equip All Of Its Automatic Timepieces With State Of The Art Movements Which, Notably, Include A Silicon Balance Spring.