Mainspring 4.0 x 20.5 x 0.30 x 745 mm with End Hook – Swiss NOS

Swiss NOS mainspring 4.0 x 20.5 x 0.30 x 745 mm with end hook – a universal replacement spring for watches.

Scope of delivery: 1x mainspring with end hook

Width (mm) – diameter (mm) – thickness (mm) – length (mm)

4.0 – 20.5 – 0.30 – 745

Width and thickness are approximate values measured by us.

You can find more matching parts in our category By Dimensions.