Very rare original ratchet wheel screw ( ratchet wheel screw / 雨受け車押さえネジ) for various high-quality Seiko automatic movements with manual winding. This precise component securely fixes the ratchet wheel to the spring barrel and is essential for reliable torque transmission of the spring barrel.
Technical details
Manufacturer: Seiko
Part number: 012513 (012-513)
Component: Ratchet wheel screw
Condition: NOS – unused, original Seiko spare part
Scope of delivery: 1 piece
Compatible calibers
4S15 – Automatic with manual winding
4S77 – Automatic with manual winding
5206 – Automatic with manual winding
5216 – Automatic with manual winding
5245 – Automatic with manual winding
5246 – Automatic with manual winding
Notice
Optimal choice for the faithful restoration of high-quality vintage automatic models of the 4S and 52xx series.
