Tissot 28.1-721, Balance, complete

• TISSOT original balance, no: 281031, new without factory packaging.
  

• Fits cal: 28.1, 28.21, 28.5.1, 28.5.21, 28.5N.21, 31.1, 31.21

Data: Tissot cal: 28,5-1

• 17 jewels, automatic wind, sub second.
• Size: 28,5 mm (12,5''').
• H: = 5,05 mm.
• N: = 19.800 A/h.
• Power reserve: 40 h.

Versions:

• 28-1: sub second.
• 28-21: sweep second.
• 28,5-1: sub second, plate with mounting flange.
• 28,5-21: sweep second, plate with mounting flange.
• 28,5N-21: sweep second, second time zone, Navigator.
• 31-1: sub second, bigger plate.
• 31-21: sweep second, bigger plate.