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Calibre SZ02 is an automatic chronograph movement from Sinn based on the Valjoux 7750.


Sinn has long used the Valjoux 7750 movement for their chronograph watches, but began reworking the movement in 2003 as the SZ01. This was followed in 2006 with this Cal. SZ02. The main difference being a 60 minute (rather than 30 minute) chronograph counter.

Once again, for the SZ02, Sinn reworked the chronograph counters. This movement was designed to be rotated 180 degrees, with the crown and pushers on the left. In this orientation, chronograph minutes are displayed in a subdial at 6:00 with chronograph hours at 12:00. The minutes counter is a full 60, however, unlike the Valjoux. Small seconds are displayed at 3:00.



Automatic chronograph movement based on Valjoux 7750
Bi-directional winding


Hours, minutes, and chronograph seconds central
Hacking small seconds at 3:00
Chronograph minutes at 6:00
Chronograph 12 hours at 12:00
Date window at 9:00


Ø 30 mm
25 jewels
28,800 A/h

Production period: