The 15551 is the diamond-bezel version of the 37 mm anniversary case, and in rose gold with a silver-toned dial the stones are the only cool element on the watch. Setting a bezel that is octagonal rather than round means each of the eight facets has to be set to its own angle.

The rose gold case measures 37 mm with a diamond bezel. The silver-toned dial carries the Grande Tapisserie pattern with rose gold applied hour-markers and Royal Oak hands, showing hours, minutes, centre seconds and a date. The watch is completed on an integrated rose gold bracelet with an AP folding clasp. The eight hexagonal screws on the bezel are oriented by hand at final assembly so they all align, which is a detail the Royal Oak has kept since 1972.

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