![Jaeger LeCoultre® calibre # 490 mainspring](http://perrinwatchparts.com/cdn/shop/products/LC-460770_cc1270bb-cce7-40bc-93ba-c279b88f7c1b_600x600.png?v=1697240926)
Jaeger LeCoultre® mainspring, part # 770, calibre # 490
mainspring to fit Jaeger LeCoultre® calibres: 9OL, 9OLN, 460, 490, K490, 491
* 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.