This two-tone 41 mm Chronograph features an 18-carat pink gold case enhanced with a Bleu Nuit, Nuage 50 ???Grande Tapisserie??? dial and a matching alligator strap. This watch is endowed with the new Royal Oak design evolution as well as the ???50-years??? oscillating weight.Case18-carat pink gold case, glareproofed sapphire crystal and caseback, screw-locked crown.Size41?mmThickness12.4?mmWater Resistance50?mDial???Bleu nuit nuage 50??? dial with ???Grande Tapisserie??? pattern, ???Bleu nuit nuage 50??? counters, pink gold applied hour-markers and Royal Oak hands with luminescent coating.CaseMaterial18-carat pink goldWater Resistance50 mSize41 mmDial???Bleu nuit nuage 50??? dial with ???Grande Tapisserie??? pattern, ???Bleu nuit nuage 50??? counters, pink gold applied hour-markers and Royal?Oak hands with luminescent coating.BraceletBlue alligator strap with 18-carat pink gold AP folding clasp.Calibre 4401FunctionsFlyback chronograph, hours, minutes, small seconds and date.Number of jewels40MechanismSelfwindingPower reserve70 hTotal diameter32 mmNumber of parts381Frequency4 hz 28800 vphThickness6.8 mm