This 37 mm model benefits from the new Royal Oak design evolution. Its 18-carat pink gold case and diamond-set bezel are contrasted with a Bleu Nuit, Nuage 50 “Grande Tapisserie” dial, in tribute to the original Royal Oak from 1972. The sapphire caseback reveals the new selfwinding Calibre 5900 and the "50-years" pink gold oscillating weight. 18-carat pink gold case, bezel set with brilliant-cut diamonds, glareproofed sapphire crystal and caseback. “Bleu nuit nuage 50” dial with “Grande Tapisserie” pattern, pink gold applied hour-markers and Royal Oak hands with luminescent coating.18-carat pink gold bracelet with AP folding clasp.