Introducing Rudis Sylva's RS12 Grand Art Horloger

I realize that it is entirely possible that I am the last person in the world to hear about Rudis Sylva, but just in case - here is the latest from them!  Needless to say, I will reach out to them for more information.

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.

Courtesy of Rudis Sylva

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.

Courtesy of Rudis Sylva

Technical Specifications for the RS12 Grand Art Horloger

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)