Seiko Spare Part 386120 (1 piece) – Setting Lever Spring for Seiko "Solar" (Vintage) – NOS

Original Seiko spare part No. 386120 – Setting Lever Spring from new old stock (NOS) for the vintage Seiko "Solar" (ソーラー). Offered is a single piece, taken from an original Seiko parts package.

The setting lever spring is a central component of the key/setting mechanism: it fixes the setting lever (おしどり / setting lever) and, through its spring arm, ensures the clean detent of the crown positions (winding/hand setting). The design – a flat, screwed plate with a springy, hook-shaped arm – is typical for this; the Japanese term "押え" (osae) on the original bag stands for exactly this holding/spring function.

Important note on the model name: "Solar" refers to the mechanical vintage Seiko "Solar" of the 1950s/1960s (dial-signed, mostly gold-plated hand-wound model series) – not a modern, light-powered solar watch.

The part is unused and in very good original condition; due to storage, at most minor, purely cosmetic traces are possible, which do not impair the function.

Manufacturer: Seiko (K. Hattori & Co., Japan).

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