UNITAS Cal. 176 (13''') Winding stem - NOS - Ronda: 536
Manufacturer RONDA, Switzerland no: 536
- Fits cal: 176, 178, 179, 204, 205, 206, 207, 600, 620, 6310, 6310N, 6325, 6330, 6425 (13''')
- Thread: 1.20 mm (D)
- A: = 80
- E: = 507
- B: = 102
- C: = 150
- D: = 120
- F: = 50
