Musical Box Mainsprings 1 Dozen

These musical box mainsprings are precision-made from quality spring steel for use in mechanical music box movements and similar fine winding mechanisms. Designed to provide smooth, consistent tension, they ensure reliable power delivery and even operation of musical movements.

Supplied in a pack of 12 mainsprings, this set is well suited to music-box makers, repair technicians, restorers, and hobbyists who require dependable replacement springs for traditional mechanical systems.

The listed size 5 m/m 14 × 25/100 follows standard horological sizing conventions, making these springs suitable for compatible music box movements requiring this specification.

Durable and resilient, these mainsprings offer good resistance to fatigue and long service life when installed correctly.