Audemars Piguet 15400 automatic watch, Royal Oak series, Automatic mechanical men’s watch, 9015 modified Calibre3120 movement, Sapphire crystal, Strong night gl

The Audemars Piguet Royal Oak 15400 automatic men's watch is driven by a 9015-modified Calibre 3120 movement beneath a sapphire crystal. Strong luminescence aids low-light legibility, while the design accommodates both steel and leather straps, including an Italian leather option. A widely accessible expression of the Royal Oak's signature octagonal aesthetic, balancing everyday practicality with the collection's distinctive integrated-bracelet heritage.