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This is the setting lever spring (Japanese: カンヌキ押工 / 裏押え)
The Zaratsu-polished case
Date of manufacture: January 1965
Caliber: mechanical hand-wound movement (Seiko 1104A)
The Asanoha pattern (麻の葉)
Seiko Stellhebelfeder - Setting Lever Spring 388541 (1 Stück) – Originalteil für King Seiko, Seiko Cronos & Seiko Champion GMT This is the setting leverRare original Seiko spare part with reference 388541 . This is the setting lever spring (Japanese: ), a central component of the winding and hand setting mechanism. This spring holds the setting lever in position and ensures the precise switching between winding and hand setting. Compatible models King Seiko First (cal. 3180) Seiko Cronos (various early hand wound calibers) Seiko Champion (e. g. 850, 860) Other early Seiko hand wound movements that
