Seikosha Spare Part – Click Spring (1 piece) – Vintage – NOS

Original and extremely rare Seikosha spare part – jumper/detent spring (Japanese 弾 / "hajiki" = jumper/spring) for vintage mechanical Seikosha movements, from new old stock (NOS). Offered is a single piece, taken from an original SEIKOSHA parts container.

The part consists of a flat mounting head with a bore and a resilient, hook-shaped arm – the typical design of a jumper/detent spring that holds a component (e.g., a lever or a wheel) in position or allows it to snap into place within the movement. Dimensions: approx. 5.5 × 2.2 mm.

Note on assignment: The movement size (lignes) is not marked on the original bag; a clear caliber assignment cannot be derived from this. Please compare the shape and dimensions with the required part before installation.

The part is unused; due to storage, only minor, purely visual traces are possible, which do not impair the function.

Manufacturer: Seikosha / K. Hattori & Co. (Japan).

Warranty (used) This is an original part (NOS) stored for decades. The limitation period for claims for defects (statutory warranty) is 12 months from delivery.

Note Before installation, please compare the shape, dimensions and fit with the required part; assembly should be carried out professionally.