Royal Oak Selfwindrolex 1520 movementing Chronograph "50th Anniversary"

This two-tone 41 mm Chronograph features an 18-carat pink gold case enhanced with a Bleu Nuit, Nuage 50 a??Grande Tapisseriea?? dial and a matching alligator strap. This watch is endowed with the new Royal Oak design evolution as well as the a??50-yearsa?? oscillating weight.Case18-carat pink gold case, glareproofed sapphire crystal and caseback, screw-locked crown.Size41??mmThickness12.4??mmWater Resistance50??mDiala??Bleu nuit nuage 50a?? dial with a??Grande Tapisseriea?? pattern, a??Bleu nuit nuage 50a?? counters, pink gold applied hour-markers and Royal Oak hands with luminescent coating.CaseMaterial18-carat pink goldWater Resistance50 mSize41 mmDiala??Bleu nuit nuage 50a?? dial with a??Grande Tapisseriea?? pattern, a??Bleu nuit nuage 50a?? 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