The Royal Oak 15500-series was introduced in 2019. Compared to the earlier 15400 it features a new movement – the self-winding caliber AP 4302 rather than the 3120. The case measures 41mm across. It is available in a number of configurations: reference 15500ST.OO.1220ST.04 has a stainless steel case, matching bracelet and a silver dial. This was added to the line-up in 2020.
