Jaeger-lecoultre, Double Wing Series, model: Q6012420. The entire watch is crafted from 18K rose gold, with a 42mm large case diameter and a white granular crystal dial. It features a Dual mainspring barrel design and a dual-Wing concept. Two independent mechanical devices are assembled in the same case: one for indicating the time and the other for controlling the chronograph function. The dial is equipped with time indication. At 3 o 'clock, there is a flyback chronograph display and a digital minute window. At 6 o 'clock, there is a dynamic display for one-sixth of a second. It features dual power reserve indicators and is powered by the self-produced Cal.380 manual winding movement with a transparent back. It is a magnificent single watch.