Landeron 47 (13.75'''), Balance staff, Ronda: 1225
- Manufacturer Ronda no: 1225
- Total length: 417
- Fits cal: 47 (13.75''')
- A: = 417 (ronda A).
- B: = 195 (ronda B).
- F: = 70 (ronda K).
- G: = 100 (ronda J).
- H: = 49 (ronda G).
Conversion: Ronda to DCN
- A = A
- B = B
- J = G
- G = J
- K = F