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+====== Rudis Sylva RS05 ======
+{{wst>image_cr|Rudis Sylva|RS05}}
+{{wst>image_cr|Rudis Sylva|Harmonious Oscillator}}
+The **RS05 Harmonious Oscillator** is a wristwatch by [[Rudis Sylva]].
+The brand Rudis Sylva caused a sensation at the [[BaselWorld]] [[2009]] with the presentation of the Harmonious Oscillator RS05, a very beautiful and technically challenging innovation. Since then a range of watches with this invention were launched.
+The watch is not only technically captivating, but fascinates also by its visual appearance and a demanding handcrafting.
+<WRAP ud ud_mod>
+**Reference:**
+  * RS05
+**Movement:**
+  * [[Manual winding]] [[manufacture movement]], 21.600 A/h
+  * Harmonious Oscillator: 2 connected Balance springs on 1 escapement
+  * [[Finishing]]:
+    * Main plate: [[bevelling]], pyramid [[guilloche]] work
+    * Hand-decorated bridges: bevelling, circular [[grainin]]g, drawing
+    * Gear train: circular graining, diamond-polished corners
+    * Screws: machine threading with controlled undercut
+    * [[Barrel]] drum: snailed
+    * [[Titanium]] cage bridge bevelling: 28 inward corners, drawing, 30 hours’ work
+  * Power reserve 42 hours
+**Case:**
+  * Pink or White Gold
+  * Ø 42.2 mm, H 18.1 mm
+  * [[Sapphire crystal]]
+  * Screwed caseback with sun dial decoration: hand-engraved with [[grand feu]] [[enamel]]
+  * The Sun dial origins from artisan watchmaker’s farmhouse from 1750, Les Bois
+**Dial:**
+  * Silvered or matt black
+  * Hand guilloche work in progressive circular pyramids pattern
+  * Hands: hand decorated
+  * Hand decoration: drawing on the 2 faces, bevelling on the flanks
+**Functions:**
+  * Hour, minute, seconds
+  * Date
+**Bracelet:**
+  * Alligator leather strap, [[tang-type buckle]]
+**Price:**
+  *  260,000 SFR (2009)
+</WRAP>
+{{tag>Watch_models Watches_with_tourbillon Rudis_Sylva_models}}