This Sinn 657 is based on the 656 model range, and designed as a functional instrument watch in the tradition of our cockpit navigation clocks, this Fliegeruhr or Pilot also features a pilot's bezel which permits its wearer to measure or check set time intervals. This is a decisive criterion particularly in aviation — reason enough for us to give this important function a superior design.

The stainless steel bezel with minute ratcheting can be rotated on both sides and features a special mechanical system developed by Sinn to protect against loss. The labelling is silver on an inset, black anodised aluminium ring to ensure optimal scale readability. A luminous triangle serves as the 0 / 60 minute mark.

This Sinn is from 2012, is in very good condition and comes as a full set with both the Steel bracelet and the rubber strap with the folding clasp.