![Jaeger LeCoultre® calibre # 800 mainspring](http://perrinwatchparts.com/cdn/shop/products/LC-480770_15f1a47b-68c3-4216-9356-da7bb47b12a6_600x600.png?v=1697242517)
Jaeger LeCoultre® mainspring, part # 770, calibre # 800
mainspring to fit Jaeger LeCoultre® calibres: 10ROL, 480, 800, 810, K830, K831
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Jaeger LeCoultre®. Jaeger LeCoultre® warranty does not apply to parts supplied by H. & W. Perrin Company Limited. Using generic parts may devalue your watch.