Longines 18.89N, 80Z, 19.89N (18, 19'''), Balance staff, Ronda: 1607

• Manufacturer Ronda no: 1607
• Total length: 435
• Fits cal: 18'''  18.89N, 80Z
• Fits cal: 19'''  19.89N

• A: = 435 (ronda A).
• B: = 221 (ronda B).
• F: =   80 (ronda K).
• G: = 125 (ronda J).
• H: =   63 (ronda G).

Conversion: Ronda to DCN

• A = A
• B = B
• J = G
• G = J
• K = F