Tissot 2400-5425, Screw for click

• TISSOT original screw, not in factory packaging.
  

• Fits cal: 2400, 2401, 2403, 2404

Versions: 1971 - 1972

• 2400:     base caliber.
• 2401:     modifications.
• 2403:     new regulator.
• 2404:     modified plate.