Sinn Spezialuhren presents a new generation of its iconic Navigation Chronograph series. Equipped with a slide-rule bezel for calculations, it is available in three dial colors: black (903 St II), dark blue (903 St B E II) and light blue (903 St HB). The latter is a limited edition of 500 pieces, while the first two are part of the standard collection.

The name Sinn Spezialuhren needs little explanation among fans of function-oriented tool watches. The German brand, based in Frankfurt am Main, is widely known for its instrument-like timepieces, which are designed to operate reliably in challenging situations thanks to many useful and intelligent in-house developments and technologies that, for example, enhance the scratch-resistance (Tegiment Technology) or prevent fogging (Ar-Dehumidifying Technology). Therefore, some elite forces, such as firefighters, rely on their mission timepieces, which are aptly dubbed “EZM” which means “Einsatzzeitmesser” in German and translates to mission timepieces.
The Navigation Chronograph 903, which cannot hide its similarity to the Breitling Navitimer, occupies a special position in its collection and also has an interesting story to tell. The founder of the brand, Helmut Sinn, once secured the rights to it during the so-called quartz crisis and at the same time bought up the machines and the remaining stock from Breitling. The 903 was never a copy, but a model in its own right, even after the reintro...