Jaeger LeCoultre® T end mainspring, part # 770, calibre # 819
T end mainspring to fit Jaeger LeCoultre® calibres: 818, 819
* 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.