AM 290 (9.75'''), Balance staff, Ronda: 46
- Manufacturer Ronda no: 46
- Total length: 343
- Fits cal: 290 (9.75''')
- A: 343 (ronda A).
- B: 180 (ronda B).
- F: = 56 (ronda K).
- G: = 79 (ronda J).
- H: = 42 (ronda G).
Conversion: Ronda to DCN
- A = A
- B = B
- J = G
- G = J
- K = F
