Combining two admired complications, the minute repeater tourbillon belongs to the world of Grandes Complications. Wound-up by two micro-rotors, the watch features a 60h power reserve. Achievement of the highly skilled Roger Dubuis watchmakers, the watch also houses some useful functions such as an 'all or nothing' mechanism to avoid a partial striking of the time, a tone playback indicator to control visually the progression of the repeater and a function indicator to check the crown position (winding or setting) to avoid using the minute repeater while setting the time which could alter the well-being of the caliber. The chimes have been specifically tune to play a special interval called 'tritone' and made up of three tones, or six semitones. It is a very beautiful yet disorienting interval that goes against everything music appears to stand for. It was forbidden to use it in the middle ages and was even christened diabolus in musica – the Devil in music.Case Pink gold case with sapphire crystal with anti-reflective coating Pink gold open case back with sapphire crystal Size: 45mm Water Resistance: 5 bar (50 m) Dial Pink gold plated and white varnished double surface flange with engraved minute track and transferred texts, polished and gold plated hour markers with white SLN in the center. Gold plated Roman numerals with polished and pink gold plated outline Trued-up white varnished beams with polished gold plated chamfers. 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: Automatic, self-winding Indications: Tone playback indicator Power reserve: 60 Hours Decor Dial side: circular-grained, trued-up or shot-blasted main plate and bridges with NAC coating Back side: circular-grained or Côtes de Genève main plate and bridges with NAC coating Technical Details Number of pieces: 558 Number of rubis: 54 Diameter: 14"3/4 Thickness: 10 mm Frequency: 21600 Frequency (vph)