SZ05

Calibre SZ05 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 the 2010s. Noting that the traditional 30-minute counter of the 7750 is difficult to read, Sinn modified the movement to feature a full 60-minute counter at 3 00 instead. The date window was moved to 6 00 and the day wheel and hour counter removed.

Applications

Sinn 358 Anniversary
Sinn 936

Description:

Automatic chronograph movement based on Valjoux 7750
Bi-directional winding

Functions:

Hours, minutes, chronograph seconds central
Hacking small seconds at 9 00
Chronograph 60 minutes at 3 00
Date window at 6 00

Data:

Ø 30 mm
26 jewels
28,800 A/h

Production period:

2011-Present