Published on April 27th, 2015 | by Daniel Sherman Fernandez


IWC Ingenieur Constant-Force Tourbillon


For the new Ingenieur Constant-Force Tourbillon, IWC has integrated a patented constant-force mechanism into a tourbillon. It ensures that the amplitude of the balance and thus the watch’s accuracy remain absolutely constant, initially by disconnecting the escapement from the direct flow of energy generated by the gear train.

The energy is stored temporarily in the balance spring from where it is transferred to the escape wheel. In the process, the balance spring is put under tension once a second and the seconds hand in the tourbillon advances in one-second jumps. This ensures an extremely regular and precise rate over a period of at least 48 hours.

After approximately two days, the movement switches from constant-force mode to normal mode, as can be seen from the second hand, which now starts to advance at intervals of one-fifth of a second.

About the Author is a service to the public and other website owners. is not responsible for, and expressly disclaims all liability for, damages of any kind arising out of use, reference to, or reliance on any information contained within the site While the information contained within the site is periodically updated, no guarantee is given that the information provided in this website is correct, complete, and up-to-date. is not responsible for the accuracy or content of information contained inside.

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to Top ↑