Measuring 41 mm, the case is fashioned from 18-carat white gold and fronted by a glareproofed sapphire crystal. The fixed bezel carries 32 baguette-cut blue sapphires totaling approximately 3.19 carats, while baguette-cut blue sapphire hour-markers carry that same deep color onto the dial itself.
The openworked rhodium-toned dial lays bare the Calibre 3132 selfwinding movement beneath, with a blue double balance bridge drawing the eye to the watch's defining complication. Running at 3 Hz (21,600 vph) with a 38-jewel, 245-part construction, the movement delivers a 45-hour power reserve alongside center seconds and the double balance wheel complication.
An 18-carat white gold bracelet with an AP folding clasp completes the watch, which carries a water resistance rating of 50 meters. Reference 15412BC.SS.1220BC.02 brings together the architecture of the Royal Oak with the mechanical transparency of high horology in a single, coherent object.
