German Clock Mainspring – 10 × 0.25 × 950mm × 25mm – NOS

German Clock Mainspring – 10 × 0.25 × 950mm × 25mm

This German clock mainspring is a New Old Stock (NOS), unused hole-end replacement spring suitable for compatible mechanical clock movements. Made in Germany from hardened spring steel, it is ideal for repairing and restoring antique, vintage and traditional mechanical clocks where the original mainspring is broken, weakened or no longer providing reliable power.

The mainspring measures 10mm wide × 0.25mm thick × 950mm long × 25mm diameter. Its traditional hole-end design is used in many mechanical clock movements; however, mainsprings must always be carefully matched to the original spring dimensions, barrel size and attachment arrangement.

Specifications

• Condition: New Old Stock (NOS), unused
• Origin: Made in Germany
• Type: Hole-end clock mainspring
• Width: 10mm
• Thickness: 0.25mm
• Length: 950mm
• Diameter: 25mm
• Material: Hardened spring steel

Suitable For

• Compatible German and European mechanical clocks
• Antique and vintage clock restoration
• Mechanical clock movement repair and servicing
• Replacement of broken, weak or fatigued mainsprings
• Professional clockmakers and experienced clock repairers

Important

Please carefully measure your original mainspring and confirm the width, thickness, length, diameter and end style before ordering.

Using an incorrectly sized mainspring may affect the clock movement’s power delivery and performance and could potentially damage the movement.

Explore More Mainsprings

Browse our Mainsprings range for replacement and New Old Stock clock mainsprings in various widths, thicknesses, lengths and end styles for antique, vintage and mechanical clock repair and restoration.

How to Measure Your Clock Mainspring

Not sure how to measure your existing mainspring? Please watch these short video guides before ordering:

• How to Measure a Clock Mainspring – Video 1: https://www.youtube.com/shorts/AfQUvI67Z7U
• How to Measure a Clock Mainspring – Video 2: https://www.youtube.com/shorts/S1Ld8QbYFYU

For the correct replacement, carefully check the width, thickness, length, diameter and end style of your original clock mainspring before purchasing.