The Royal Oak Selfwinding ref. 15400ST.OO.1220ST.01 is the black-dial stainless-steel 41 mm 15400 configuration. WatchBase identifies the watch as Royal Oak 15400 Stainless Steel / Black, produced 2012–2019, with AP Calibre 3120, a 41 mm stainless-steel case and bracelet, 50 m water resistance and…
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