Sinn introduced the model 857 as an update to the Sinn 657. It features a larger 43 mm case (up from 41 mm), TEGIMENT case, and Ar-Dehumidifying technology. As was the case with the 657/656, a smaller version with a fixed bezel is also produced, the Sinn 856. But the 857 has a bi-directional movable pilot's bezel. The watch is magnetic field protected.
In 2010, Sinn created the EZM 7, a Mission Timer for fire brigades. Essentially identical to the existing Sinn 857, the EZM 7 rotates the case 180 degrees so the crown is on the left side of the dial. The inner portion of the dial features scales measuring important aspects of firefighting. An EZM 7 S was added as well.