A closer look at the Audemars Piguet Royal Oak double balance wheel, black ceramic hollow
Following the success of the Audemars Piguet Royal Oak hollow stainless steel double balance wheel, the Associated Press has launched a secret and sexy black ceramic version. In 2016, when the stainless steel version was launched on SIHH, we first set our sights on the Audemars Piguet Royal Oak Double Balance Skeleton Watch. Its patented second balance wheel and hairspring assembly are located on the same axis, which not only…