IWC 75, 76, 86 (10'''), Balance staff, Ronda: 1354
- Manufacturer Ronda no: 1354
- Total length: 310
- Fits cal: 75, 76, 86 (10''').
- A: = 310 (ronda A).
- B: = 158 (ronda B).
- F: = 62 (ronda K).
- G: = 90 (ronda J).
- H: = 41 (ronda G).
Conversion: Ronda to DCN
- A = A
- B = B
- J = G
- G = J
- K = F