Seiko Replacement Part – Click Screw for Model Birdie (こはぜ捻) (1 Piece) – NOS

Original Seiko click screw from new old stock (NOS) – the screw that secures the click (こはぜ / pawl), which locks the ratchet wheel and prevents the mainspring from unwinding. Designated on the original packaging as "コハゼ捻 / 甲馳捻" (= こはぜねじ, "click screw").

One single piece is offered, taken from original Seiko packaging.

The packaging also bears the model designation Birdie (reading "バーデイー").

The part is unused; due to storage, there may be minor, purely cosmetic traces that do not affect functionality.

Manufacturer: Seiko (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.