SA roots
The founder of Sinn Spezialuhren GmbH, Helmut Sinn, was not only a pilot in his heart and soul but also a skilful businessman. When Breitling stopped production in 1979 due to financial difficulties, the then 63-year-old secured the individual parts of the Navitimer and then produced the model under the name Sinn 903. Breitling lettering can be found on various components, especially in Sinn 903 St vintage models; in the early days of the Sinn model, some dials even bore the inscription "Sinn Navitimer".