Tissot 28.5R-21, Balance staff, no: 281029R
- NOS Tissot original part, no: 281029R
- Fits cal: 28.5R.21, 28.5R.621
Data: Tissot cal: 28.5 R.21 (1952 - 62).
- 17 jewels, automatic wind, sweep second.
- Size: 28,5 mm (12,5''').
- H: = 6,05 mm.
- N: = 19.800 A/h.
- Power reserve: 40 h.
Versions:
- 28.5R.21: sweep second.
- 28.5R.621: sweep second, date.