Audemars Piguet Royal Oak Double Balance Wheel Openworked 15407ST

About This Watch

The Audemars Piguet Royal Oak Double Balance Wheel Openworked 15407ST is a mesmerizing display of haute horlogerie engineering within the Royal Oak's iconic case. The caliber 3132 features two balance wheels connected by a differential gear system, which averages the rate of both regulators to achieve greater precision and stability. This double balance wheel is visible at 6 and 12 o'clock, beating in hypnotic synchronization. The entire movement is openworked, meaning the bridges and plates have been reduced to the bare mechanical minimum, revealing every gear, wheel, and spring. Each remaining surface is meticulously hand-finished with Geneva stripes, beveled edges, and satin brushing, a process that takes significantly longer than finishing a standard movement because every surface is visible. The result is a three-dimensional mechanical sculpture visible through both the dial side and the sapphire caseback. In stainless steel, this haute horlogerie complication becomes surprisingly accessible compared to the gold and platinum variants. The 41mm case maintains the familiar Royal Oak proportions, meaning this extraordinary mechanical art comes in a package suitable for daily wear. It represents the perfect intersection of haute horlogerie and modern sports watch design.