Watch Mainspring

Mainspring for mechanical movements

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No Mainspring available right now.

About Watch Mainspring

Finding the right mainspring for a watch repair or restoration requires matching exact specifications — diameter, thickness, material, and reference number all matter. HoroParts lists mainspring with full condition grading, SKU references, and compatibility notes so you can order with confidence.

We carry both original OEM mainspring sourced from manufacturer supply channels, and precision-grade aftermarket alternatives for watchmakers who need reliable options at a better price point. All parts are inspected and graded before listing.

✓ OEM originals and verified aftermarket

✓ Full condition grading on every item

✓ SKU and reference number always listed

✓ Compatible brands noted in description

✓ Worldwide shipping, English & Spanish support

Find Mainspring by Brand

Filter by watch brand to narrow down compatible mainspring.

Not sure which part you need?

Check the watch reference number on the caseback. For OEM parts, this matches the manufacturer part number. For aftermarket, use diameter and thickness measurements.

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