Certina 13.20, Insetting for balance, upper & lower

• CERTINA original parts in very good used condition.

• Complete with insetting and cap jewel.

• Fits cal: 13.20, 13.21, 13.22

Versions:

• 13.10: N: = 18.000 A/h.
• 13.11: N: = 19.800 A/h.
• 13.20: N: = 19.800, no threads for casing clamps.
  
• 13.21: N: = 19.800, threads for casing clamps.
  
• 13.22: N: = 21.600, threads for casing clamps.