Certina 13.20-721, Balance, complete, New

• CERTINA original balance complete in factory selaed packaging.
  

• Fits cal: 13.20, 13.21 (19.800 A/h)

Data:

• 17 jewels, manual wind.
• Size: 5,75 x 6,75´´ 13 x 15,25 mm.
• H: = 3,55 mm.
• N: = 19.800 A/h.
• Power reserve: 43 h.
• Mainspring: 1.35 x 5.5 - 0.065 - 210

Versions:

• 13.20: N: = 19.800, no mountings.
• 13.21: N: = 19.800, mounting threads.
• 13.22: N: = 21.600, mounting threads.