2012/12/18 - Rudis Silva Presents the RS12 Grand Art Horloger

 

Rudis Sylva is proud to present the RS12 Grand Art Horloger, the third generation of timepieces equipped with the Harmonious Oscillator and decorated in the most exquisite fashion.

This revolutionary regulator featuring two toothed balances is a unique invention minimising the effects of gravity while boasting highly sophisticated decorative details hand-worked by the Jura region's finest craftsmen. Its technical characteristics are also exceptional:

• The two toothed balances are interlinked. This link ensures the same amplitude. The symmetry and energy of the balance springs are constantly opposed, enabling instantaneous average correction in the vertical position, which minimises the effect of gravity.
• The cage turns 360 degrees in 60 seconds
• The pallet fork is positioned at 90 degrees
• The double barrel ensures a power reserve of 70 hours
• The frequency is 21,600 vibrations/hour (3 Hz)

Seconds indicator bridge
Machined from titanium and hand-bevelled, this bridge at 6 o’clock includes no fewer than 28 internal angles. It takes 10 times longer to create a sharp internal angle in titanium than a rounded corner in steel.

Main plate
The lower part of this strategic component features a hand-crafted guilloche decoration of tapering pyramids. From the edge to the centre of the piece, each guilloche line includes 60 pyramids, each one smaller than its neighbour, requiring extremely meticulous guilloche operations.

Engraving
Apparent in the marking on the double barrel bridge or the caseback sundial and inscription, the extremely precise engraving magnifies the skill of the hand-engraver whose painstaking work is carried out under microscope.

Oven-fired enamel

Silica stones are crushed by hand and mixed with water. The resulting material is then applied to the hand-engraved surfaces and placed in a special oven at 840°C. The resulting enamel is then polished to obtain the perfect dial.

The unique technology offered by Rudis Sylva positions the Harmonious Oscillator above most existing tourbillons, since the effects of gravity to which it is subjected are minimised. The hand-finishing makes each piece unique and pays tribute to the various branches of watchmaking artistry.

 

 

Technical Specifications

Case : red or white gold 18k

• Width : 44 mm
  
• Height : 14.3 mm
  
• Case finish : vertical satin finish
  
• Bezel finish : polished
  
• Horn finish : welded, polished and micro-blasted
  
• Inter-horn distance : 23 mm

Back : red gold or white gold, screwed

• Engraving : by hand
  
• Decoration : hand-engraved sundial with overn-fired enamel
  
• Sundial origin : artisan watchmaker's farmhouse from 1750, Les Bois
  
• Strap : real alligator, large scales with tassel
  
• Buckle : tongue red gold or white gold 18k
  
• Crown : red gold or white gold with engraved logo
  
• Brand logo : 3 fir trees on 3 mountains
  
• Logo symbolism : settling of the Jura by clearing, around 1350

Dial : hour, minute and second indicator

• Hour and minute indicator ring : sundial decoration
  
• Second indicator ring : bevelled
  
• Hand centre : hand guilloche work
  
• Hand guilloche work pattern : progressive circular pyramids

Hands : gold, hand decorated

• Decoration : drawing on the 2 faces, bevelling on the flanks

Main plate : hand guilloche worked, 60 tapering pyramids

Movement  : Harmonious Oscillator

• Dimensions : h. 7.78 mm / Æ 39.55 mm
  
• Winding : manual, 49 crown revolutions
  
• Power reserve : about 70 hours
  
• Manufacture : made by Rudis Sylva
  
• Purchases from third parties : 7 parts: escapement, stones, spring, Incabloc
  
• Indicators : hour, minute, seconds
  
• Main plate machining : on machine with bed plate, 175 operations
• Precision-tested : 100% of components

Harmonious oscillator : system unique worldwide, patent no. 575/09

Balances : toothed, interlinked, ensuring the same amplitude
Escapement : only 1 with 1 pallet fork positioned at 90 degrees
Frequency : 21,600 vibrations/hour (3 Hz)
Cage rotation : 360 degrees in 60 seconds
Cage diameter : 17.40 mm
Balance-springs : 2, flat, asymmetric deployment
Balance-spring symmetry and energy : constantly opposed
Vertical gravity correction : instantaneous, minimising the effect of gravity

Finishing : Haute Horlogerie finishing
Main plate : bevelling, tapering pyramid guilloche work
Bridges : hand-decorated, bevelling, circular graining, drawing
Gear train : circular graining, diamond-polished corners
Screws : machine threading with controlled undercut
Barrel drum : snailed
Titanium cage bridge : bevelling, 28 internal angles, drawing (30 hours' work)