OMEGA SA WORLD SERVICE ORGANIZATION GT-19-C-006-E - D - 2628
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Date correction
The date Correction is not recommended between 10 p.m.
and 2 a.m.
Improvements on version B
Complete balance bridge (Ref. 10.058°)
Chronometer balance bridges are not available
(see CS-Info. Calibre No. 33).
Tightening and untightening torques according to screw
thread size
Screw Ø Tightening torque target cNm Untightening torque mini cNm
Ø threads ≤ S 0.50 mm 1.0 0.7
Ø threads S 0.6 mm 1.4 0.8
Ø threads S 0.7 mm 1.8 0.9
Ø threads S 0.8 mm 2.2 1.1
Ø threads S 0.9 mm 2.6 1.3
Ø threads S 1.0 mm 3.0 1.6
Ø threads S 1.2 mm 3.5 2.0
Ø threads S 1.4 and > 4.0 2.5
Type of intervention and the required
«Measure Instrument»
General information for Calibre 2628
Version A Version B
Quality of adjustment:
Good
Quality of adjustment:
Improved
Self-starting: Medium Self-starting: Good
Interventions Minimum equipment required Comments
Complete or Partial maintenance
service Co-Axial 3.5 Hz & 4 Hz
- Watch Expert II (White case)
- Chronoscope M1 (up-dated version)
- Chronoscope S1
Rate adjustment on new watches:
(Co-Axial 3.5 Hz & 4 Hz)
- Watch Expert (red case)
- Wicometer Professionnel
- Chronoscope M1 (old version)
Important: The amplitude will
not be indicated precisely.
This is acceptable for the
rate adjustment only!
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