This video depicts a novel two degrees-of-freedom (2-DOF) mechanical watch time base called Wattwins. The video demonstrates how this silicon flexure (aka compliant) oscillator can be driven by a mechanical watch movement. In comparison to the widely used balance and hairspring 1-DOF oscillator, 2-DOF oscillators have the potential of revolutionizing mechanical watchmaking by eliminating the traditional escapement, replacing it by a simple crank driving a pin. Detailed explanations about the design of this oscillator and how it is made insensitive to linear accelerations such as gravity can be found in the following article:
- H. Schneegans, E. Thalmann, S. Henein, “Shaking force balancing of a 2-DOF isotropic horological oscillator”, Precision Engineering, vol. 72, 2021, pp.502-520, https://doi.org/10.1016/j.precisionen...

More information about the IsoSpring concept, i.e., 2-DOF mechanical time bases, can be found in the following publications:
- L. Rubbert, R. Bitterli, N. Ferrier, S. Fifanski, I. Vardi, S. Henein, “Isotropic springs based on parallel flexure stages”, Precision Engineering, vol. 43, 2016, pp 132-145, https://doi.org/10.1016/j.precisionen....
- I. Vardi, L. Rubbert, R. Bitterli, N. Ferrier, M. Kahrobaiyan, B. Nussbaumer, S. Henein, “Theory and design of spherical oscillator mechanisms”, Precision Engineering, vol. 51, 2018, pp. 499-513, https://doi.org/10.1016/j.precisionen....
- S. Henein, I. Vardi, L. Rubbert, R. Bitterli, N. Ferrier, S. Fifanski, D. Lengacher, “IsoSpring : vers la montre sans échappement”, Journée d'étude de la Société Suisse de Chronométrie 2014, https://infoscience.epfl.ch/record/20...

Clock-size implementations of the concept can also be seen in the following videos:
-    • Le futur de l’horloge neuchâteloise p...  
-    • IsoSpring   la fin du tic tac   BNJ TV  

Wattwins contributors: R. Bitterli, L. Convert, T. Füssinger, R. Gillet, S. Henein, M.H. Kahrobaiyan, A. Maurel, B. Nussbaumer, H. Schneegans, E. Thalmann, I. Vardi.

Video edited by Etienne Thalmann.