Jaeger LeCoultre® mainspring for movement, part # 770, calibre # 911
mainspring for movement to fit Jaeger LeCoultre® calibres: 910, 911
* 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.