![Jaeger LeCoultre® calibre # 426/1 mainspring](http://perrinwatchparts.com/cdn/shop/products/LC-426770_4051eceb-da83-4cda-90df-af555b9ac3af_600x600.png?v=1697234660)
Jaeger LeCoultre® mainspring, part # 770, calibre # 426/1
mainspring to fit Jaeger LeCoultre® calibres: 426, 426/1, 426/2, 426M
* 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.