Certina 320-423, Crown wheel core

• CERTINA original part in very good used condition.
  

• Fits cal: 320, 320B, 320T, 321, 321T, 324, 324T
  

Data Certina 320

• 15 jewels, manual wind, sub second.
• Size: 12''' 27.0 mm.
• H: = 3.80 mm.
• N: = 18.000 A/h.
• Power reserve: 42 h.

Versions:

• 320: sub second.
• 320B: sub second, date hand.
• 320T: sub second, date.
• 321: sub second, different bridge shapes.
• 321T: sub second, different bridge shapes, date.
• 324: center second.
• 324T: center second, date.