Venus 180, Balance staff, DCN: 1881
- DCN no: 1881
- Fits cal: 180, 181, 182, 202, 203, 204, 208, 214, 216, incabloc (10,5 - 11,5''').
- A: 322
- B: 155
- F: 60
- G: 90
- H: 38
Versions:
- 180 - 182: 10,5'''
- 202: 11,5'''
- 203: 11,5''', calendar, moon phase.
- 204: 11,5''', calendar.
- 208: 10,5''', date.
- 214: 10,5''', day, date.
- 216: 11,5''', big date.