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Power reserve, Tourbillon
Excalibur Double Tourbillon.Roger Dubuis, Horloger Genevois, Excalibur Double Tourbillon, No. 07/28. Made in a limited edition.of 28 pieces in white gold circa 2007..Very fine, rare and extremely unusual, large, water-resistant, 18K white gold wristwatch
C. Three-body, polished and brushed, notched bezel, triple lugs, protected winding crown with hinged protected.cover, the back with 6 screws, Roger Dubuis RD engraved monogram pattern, apertures to view the power.reserve indication and both tourbillons, sapphire crystals. D. Mother of pearl with applied baton hour indexes in the.upper half concentric with the retrograde minute sector with black Arabic numerals and minute track, the lower half.with bold black painted large Roman numerals, two white gold-rimmed apertures for the flying tourbillons. White.gold dauphine hands, blued steel seconds hand on each tourbillon. M. Manual-winding, RD Caliber 01, rhodiumplated.fausses cotes decoration, stamped with the Seal of Geneva Quality Mark, 52 jewels, double flying tourbillon.with differential, each tourbillon beating at 21,600 vph, three equidistant-arm carriage, lateral lever escapement.monometallic balance, self-compensating flat balance spring, shock absorber..Dial, case and movement signed..Diam. 46 mm. Thickness 16 mm.