Sinn 156.1 Chronograph SZ01 Movement 43mm Watch with Innovative Features and Screw-Down Case.Sinn 156. 1 Description The innovative features of the new model 156. 1 are reflected in the SINN in house chronograph Movement SZ01. Its advantages include the ability to record stop times more easily, quickly, and accurately. The SZ01 Movement is incorporated into a case with a newly designed screw down case back, aesthetically recreating the slide case of its historical predecessor with a diameter of 43mm. Official Price 874,500 JPY (tax included)