213 - BREITLING, Switzerland. Navitimer. Unfinished chronograph case assembly (case middle + crystal), without the steel case back, pushers, or winding crown, and without the movement or dial. Bezel featuring the famous circular logarithmic slide rule, an iconic signature for aviation navigation calculations.

BREITLING, Switzerland. Navitimer. Unfinished chronograph case assembly (case middle + crystal), without the steel case back, pushers, or winding crown, and without the movement or dial. Bezel featuring the famous circular logarithmic slide rule, an iconic signature for aviation navigation calculations. Domed sapphire crystal. Case diameter (excluding crown): 41 mm. Like-new condition. Pierced lugs. In 1952, Breitling was commissioned by the Aircraft Owners and Pilots Association (AOPA) to create a chronograph for its members. The result was the Navitimer, a revolutionary wrist-mounted flight computer that allowed users to perform key calculations, such as rate of climb and fuel consumption. Its innovative design made the Navitimer an indispensable tool for aviators and a legendary icon of watchmaking.