The Longines Heritage Military COSD is a reissued model inspired by military requirements, with a characteristical design of watches worn by and created for British paratroopers circa 1940s. From the NATO strap and broad arrow on the dial that were used at that time for all military equipment, the rich history of Longines is bestowed upon this model. Based on a piece of equipment used by the British Special Forces in the 1940s, the Longines Heritage Military COSD is marked with the initials COSD—an acronym for the Combined Operations Command created by the British War Office during WWII as it was solely made for and used by these paratroopers. 

With a 40mm steel case housing an L619.2 self-winding calibre mounted on either a black leather or khaki NATO strap, the Longines Heritage Military COSD is lightweight despite its straps that were designed to withstand rigorous activities and military equipment. Other features include an opaline dial that has a chapter-ring with large black Arabic numerals and a red 24-hour scale with blued hands. The railway-track minute ring also adds a touch of military flair to the timepiece. Available in matt black dial and rhodium-plated hands, the upper part of the dial is a broad arrow—a symbol for government property in Britain at that time. This symbol can be found on other military equipment such as watches used by the British forces. Super-LumiNova is also coated on the numerals and hands, enabling for an easier way to read the time under all conditions.