Breitling Navitimer 806
From Chronopedia
1952: The birth of the Breitling Navitimer
The Breitling Navitimer is an evolution of the 1942 Breitling Chronomat, with its typical slide rule bezel. Breitling decided to improve this highly practical bezel and in 1952, the ‘Navi’ was born. This slide rule bezel was used to calculate complicated operations without any other tool. The 1942 Chronomat came with an out-sourced movement, the Venus 176. It was used by the United States Air Forces.