top of page

The Harmonious Oscillator, from Rudis Sylva, features a system with two mechanically interlinked balances driven by a single escapement. This technical innovation goes against watchmaking theories, which have always ruled out stress on the balances.


With its innovative technicality, this design can boast a more accurate setting capacity than a conventional tourbillon, thanks in particular to the asymmetric deployment of the balance springs in all positions, hence the name “Harmonious Oscillator”. This world first with two toothed balances exhibits a resonance effect from the first oscillations.


Mika Rissanen, a watchmaker specialising in grand complications working for the Rudis Sylva brand, is the brains behind this patented invention.


The technical specifications are as follows:


  • Two complete toothed balances are interlinked. This combination ensures the same amplitude. 

  • The symmetry and energy of the balance springs are constantly opposed, enabling instantaneous average correction in the vertical position, which eliminates the effect of gravity.

  • Frequency: 21,600 vibrations/hour (3 Hz)

  • The cage turns 360 degrees in 60 seconds

  • Cage diameter: 17.40 mm

  • 2 flat balance springs, asymmetric deployment

  • 2 specifically shaped toothed balances made from special material

  • 1 escapement with 1 lever positioned at 90 degrees

  • Manual winding mechanism

  • Power reserve: around 70 hours


How to distinguish the Harmonious Oscillator from the Tourbillon


As a general rule, and as long as it is in a completely stable state, a tourbillon requires a minute to compensate for the effects of gravity. The Harmonious Oscillator enables instantaneous time correction in a vertical position by means of the interconnection of the balances and asymmetric deployment of the balance springs. So it is never influenced by the Earth’s gravity.


In conclusion, the Harmonious Oscillator offers far better accuracy than conventional tourbillons or carrousels. This mechanism is close to perfection in terms of setting. Tests performed on various measuring instruments give exceptional results, in particular with regard to amplitude in all positions, or after 24 hours in a vertical position. The measured Δ amplitude are also excellent (difference in degrees amplitude upon position changes).

bottom of page