The 15510ST.OO.1320ST.01 is the 41 mm stainless-steel Royal Oak Selfwinding 50th Anniversary model with the ergonomic 2022 case/bracelet update and a Bleu Nuit, Nuage 50 Grande Tapisserie dial. AP's official page specifies the steel case and bracelet, 50 m water resistance, Calibre 4302 automatic…
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