When it comes to chronograph wristwatches Breitling is no stranger to pioneering feats of the complication. In 1915 Breitling was one of the earliest manufacturers to release a chronograph wristwatch. In 1923 Breitling patented the first two-pusher chronograph allowing for the first time a chronograph to time separate successive intervals without having to reset to zero between each. With already an illustrious heritage of manufacturing chronograph timepieces it was the launch of the Navitimer that propelled the firm to new heights. The Navitimer is a tool watch in the purest sense. Each element of the watch was designed specifically for accuracy and efficiency in execution. The beaded edge allowed for pilots to grasp and turn the bezel while wearing thick leather gloves. The slide rule a rather baffling complication to the layman was critical in making intricate calculations in the pre-digital era.