The Calibre 813 is an automatic movement from Jaeger-LeCoultre.
Calibre 813 lacks the power reserve indicator of the earlier Cal. 481 but adds a small date at 3 00. It runs at 19,800 A/h, an improvement over the original 18,000 A/h Cal. 476, which it replaced. Like its predecessor, it is a bumper movement. Other major differences are the date wheel and small seconds.