Aesthetics. precision and balance come together in the patented geometry of the Royal Oak Double Balance Wheel Openworked. The complex mechanism is visible from both sides of this 37mm white gold watch featuring the scintillating Frosted Gold finishing. Hammered 18-carat white gold case. glareproofed sapphire crystal and caseback. screw-locked crown. Openworked rhodium-toned dial. pink gold applied hour-markers and Royal Oak hands with luminescent coating. Hammered 18-carat white gold bracelet with AP folding clasp.