Bleu nuit nuage 50 was mixed for the fiftieth year and is deeper than the standard Royal Oak blue — named for a clouded night sky rather than for the colour. At 37 mm there is less dial to carry it, so the gradient across the Grande Tapisserie grid is compressed and the dial reads darker overall.The stainless steel case measures 37 mm with an octagonal bezel. The Bleu nuit nuage 50 dial carries the Grande Tapisserie pattern with white gold applied hour-markers and Royal Oak hands, showing hours, minutes, centre seconds and a date. The watch is completed on an integrated stainless steel bracelet with an AP folding clasp. The anniversary references are identified by their oscillating weight rather than by any dial marking, so the reference number is the only tell from the front. Part of the Royal Oak collection.This exceptional piece is not currently in stock due to its rarity on the market. Please register your interest, and our sourcing team will leverage our global network of collectors and trusted partners to pursue one on your behalf.