Credits: Article and images by @ Revolution Watch Magazine. See the original article here - https://revolutionwatch.com/christies-auction-the-champion-collection-part-vi-the-finest-watchmaking/
A tourbillon isn’t a simple mechanism by any measure, tapping on the energy within a movement to drive the escapement round and round to average out positional errors as a watch is worn throughout the day. Watchmakers Robert Greubel and Stephen Forsey have made their name in taking this idea and ladling on layers of complexity in the pursuit of chronometric perfection. In this instance, two tourbillons are used, rotating on two axes within double cages each — hence “quadruple” in effect — and mated via a differential to average out timing inconsistencies over a greater range of positions than is possible with a single tourbillon. In 45mm platinum case, the watch in unworn condition also includes a free servicing (conditions apply) from Greubel Forsey.
Estimate: HK$1,800,000–3,600,000
Credits: Article and images by @ Revolution Watch Magazine. See the original article here - https://revolutionwatch.com/christies-auction-the-champion-collection-part-vi-the-finest-watchmaking/
