Jaeger le Coultre 467, 470, 487, 499 (12.5'''), Balance staff, Ronda: 1530
- Manufacturer Ronda no: 1530
- Total length: 364
- Fits cal: 467, 470, 487, 499 (12.5''').
- A: = 364 (ronda A).
- B: = 170 (ronda B).
- F: = 45 (ronda K).
- G: = 100 (ronda J).
- H: = 49 (ronda G).
Conversion: Ronda to DCN
- A = A
- B = B
- J = G
- G = J
- K = F