Royal Oak Ref. 15500 and 15550
The Royal Oak was revamped again in 2019, with major updates on its performance. Both the 15500 and 15550 feature the 41mm and 37mm case sizes and the modern-style AP folding clasp introduced in the 2012 models. They also come with a choice of black, blue, white, or slate dial colors for the steel version, and a black dial for the rose gold edition.
Technically speaking, these releases are the same Royal Oaks you have known for decades, but what gives them away are their thicker baton indices, omitted “Automatic” label at 6, and stretched ‘AP’ and ‘Audemars Piguet’ logos below 12 that endorse greater readability.