Using the Dual-Wing concept has enabled the Jaeger-LeCoultre watchmakers to create the first tourbillon with precision adjustment. The small seconds can be reset with a push-piece, according to the flyback principle. A particular feature of flyback is that it does not stop the function of the regulating organ. The small seconds hand is reset, and immediately continues its course. As a result, the watch retains maximum precision even while the time is being set, accurate to one second.