Inspired by nature, this watch marries complicated mechanics with sophisticated aesthetics. Around the emblematic tourbillon, a carefully selected gradation of blue sapphires and white diamonds is placed on the bezel to pay homage to the sky during the famous blue hour, when the sun sets, and light appears below the horizon.As the day turns to night, the sky takes on mesmerizing colours - a period known as the “blue hour”. Mirroring this transition from light to dark, 10 white diamonds and 50 blue sapphires have been set in a gradient on the bezel. A sophisticated way of enhancing the tourbillon. The Roger Dubuis tourbillon is instantly recognizable. Its flying construction, its position at 7 o’clock and its mirror-polished upper cage, reminiscent of a Celtic cross, are the unmistakable signatures of our Manufacture. The hypnotic tourbillon is enhanced by a modern architectural surrounding. What’s more, the skeleton unveils remarkable decorations which require 16 types of finishes, all executed by hand and whose excellence is certified by the Poinçon De Genève.Case Pink Gold 750/1000 case with open case back Sapphire crystal, Pink Gold 750/1000 bezel set with 60 baguette-cut blue sapphires and diamonds Size: 42mm Water Resistance: 10 bar (100 m) Dial Brass bezel with Pink Golden Galvanic treatment, brass applied indexes with Pink Golden Galvanic treatment filled with black SuperLuminova. Main material: Pink Gold 18K Strap According our non-exotic policy, Excalibur collection is adorned with a premium calf leather strap, built in volume to follow the design of the case and the movement. The strap is interchangeable thanks to Quick Release System. Type: Calf Color: White Clasp Pink gold 750/1000, triple folding buckle interchangeable with Quick Release System - QRS Type: Pink Gold 18K MOVEMENT Energy: Manual-winding Indications: Hour - Minute Power reserve: 72 Hours Decor Shot-blasted and trued-up main plate and bridges with NAC or Blue CVD coating Technical Details Number of pieces: 194 Number of rubis: 19 Diameter: 16 Thickness: 6.9 mm Frequency: 21600 Frequency (vph)