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.