ITW with Rudis Sylva || Red & Black Harmonious Oscillator

The Harmonious Oscillator, a standard bearer in the fight against gravity

When the Harmonious Oscillator was unveiled at Baselworld 2009, many watchmakers declared the invention to be as important as the Breguet Tourbillon created over 200 years earlier.

This horological revolution with toothed balances is the only device in the world that instantly eliminates the effect of gravity in the vertical position. The two toothed balances are interlinked. This link ensures the same amplitude. The symmetry and energy of the balance springs are in permanent opposition, enabling instantaneous average correction in the vertical position.

The Harmonious Oscillator, which is the world's number one gravity-combating device, is not only an embodiment of technical brilliance; it also appears in only the most lavish surroundings. It is always associated with rare feats of craftsmanship such as engraving, enamelling, guillochage and bevelling.

Jacky Epitaux, Founder and CEO of Rudis Sylva presents us the Red & Black Harmonious Oscillator

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Reference RS12Red & Black Titanium or white or rose gold
Width44 mm
Height14.3 mm
Case finishvertical satin finish
Bezel finishtitanium
Horn finishpolished and micro-blasted
Inter-horn distance23 mm
BackTitanium, screwed
Engravingby hand
Decorationhand-engraved sun dial with grand feu enamel
Sun dial originartisan watchmaker's farmhouse 1750, Les Bois

real alligator, large scales with tassel




pink gold with engraved logo

Brand logo

3 trees on 3 mountains

Logo symbolism

settling of the Jura by clearing, around 1350

Dialhour, minute and second indicator
Hour and minute indicator ringsun decoration
Second indicator ringbevelled
Hand centrehand guilloche work
Hand guilloche work patternprogressive circular pyramids
Handsgold, hand decorated
Decorationdrawing on the 2 faces, bevelling on the flanks
Main platehand guilloche worked, 60 tapering pyramids
MovementHarmonious Oscillator
Dimensions7.78 mm x 39.55 mm
Windingmanual, 49 crown revolutions
Power reserveabout 70 hours
Manufacturemade by Rudis Sylva
Purchases from third parties7 parts: escapement, stones, spring, Incabloc
Indicatorshour, minute, seconds
Main plate machiningon machine with bed plate, 175 operations
Accuracy check100% of components
Harmonious Oscillatorsystem unique worldwide, patent no. 575/09
Balancestoothed, interlinked, ensuring the same amplitude
Escapementonly 1 with 1 pallet fork positioned at 90 degrees
Frequency21,600 vibrations/hour (3 Hz)
Cage rotation360 degrees in 60 seconds
Cage diameter17.40 mm
Balance-springs2, flat, asymmetric deployment
Balance-spring symmetry and energyconstantly opposed
Vertical gravity correctioninstantaneous, completely eliminating the effect of gravity
Movement finishesHaute Horlogerie finishing
Main platebevelling, tapering pyramid guilloche work
Bridgeshand-decorated, bevelling, circular graining, drawing
Gear traincircular graining, diamond-polished corners
Screwsmachine threading with controlled undercut
Barrel drumsnailed
Titanium cage bridgebevelling, 28 inward corners, drawing (30 hours' work)