A 1968-69 stainless steel Breitling Navitimer large case model 1808, serial number 1255985. This is the same movement as the Heuer Monaco. Breitling introduced this larger funkier case alongside the traditional Navitimer 806 and the chronomat 808. The chronomat was first released in 1942 and one of the first to have a slide rule. It was the popularity of the chronomat and also AOPA (aircraft owners & pilots association) who developed the Navitimer with Breitling. So the Chronomat - Chrono-matic has evolved from 1942 and is another line to the brand Breitling. The watch for sale is in exceptional condition and is considered almost new old stock. The dial is original as is the slide rule and outer bezel.