The Longines L2.836.4.52.8 watch combines a 43mm round shaped stainless steel case and brown leather strap. It has a black analogue dial with luminescent hands which is protected beneath scratch resistant sapphire crystal glass. Power is generated by the automatic movement and is a ultra chronometer which ticks 10 beats a second for garunteed higher precision. This model also has a water resistance of up to 30 metres.