Seiko 388442 – Setting Lever Spring (1 piece) for King Seiko – Genuine Seiko spare part

This original Seiko spare part, part number 388442 , is a setting lever spring , as used in various King Seiko movements. It is a vintage original part from a Japanese watchmaker's stock , ideal for servicing, restoration, or as a spare part.

Technical and historical classification
The setting lever spring is a key component in the winding and hand-setting mechanism ("Keyless Works"). It ensures that the setting lever is guided and held in the correct position. Without an intact setting lever spring, a precise switch between winding and hand-setting is impossible.

compatibility
According to Japanese parts lists and packaging, the spring is intended for King Seiko watches. It is found particularly in movements of the earlier KS series (e.g., the 44 and 45 series).
Since these springs have similar shapes across different movements, they are also compatible with certain chronographs , Seiko Champion and other early Seiko mechanical movements – please check your model before ordering.

Condition
• Original Seiko old stock (“New Old Stock”)
• Unused, stored clean