Watch Barrel Spring – DERBY 40 [NOS] (Mainspring)

New old stock barrel spring for DERBY 40 caliber.

Replacement mainspring for watch movement, compatible with the DERBY 40 caliber. New old stock (NOS) part, may show slight traces related to storage.

Sold individually (unless otherwise stated in the title) · NOS · May show signs of age · Photos are representative

Features

Origin

These parts may come from different suppliers and stocks depending on availability. Regardless of their origin, excellent quality is guaranteed; each item is carefully selected before being offered for sale.