![Jaeger LeCoultre® calibre # 402 mainspring](http://perrinwatchparts.com/cdn/shop/products/LC-427770_0257f8cd-fbae-48b1-b04d-a361123436ef_600x600.png?v=1697233533)
Jaeger LeCoultre® mainspring, part # 770, calibre # 402
mainspring to fit Jaeger LeCoultre® calibres: 8RF, 8RFO, 402, 427
* 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.