Audemars Piguet Royal Oak Double Balance Wheel Openworked 41mm Skeleton Steel 15407ST.OO.1220ST.01

The Audemars Piguet Royal Oak Double Balance Wheel Openworked 41mm, reference 15407ST.OO.1220ST.01, is a stainless steel automatic watch from the Royal Oak collection, produced around 2018. Its defining feature is the openworked, skeletonised dial, which leaves the movement visible instead of covering it with a conventional face. The octagonal case measures 41 mm in diameter and is paired with a steel bracelet, so the case and bracelet share the same material. A sapphire crystal covers the dial side. The watch is intended for wearers interested in seeing the mechanical components of an automatic movement during normal use.

Because the dial is openworked, the movement's components, including the double balance wheel arrangement, are visible from the front rather than hidden. This is the central practical characteristic of the reference: the mechanism can be observed directly, and the skeletonised layout gives the watch its visual character. The steel case and steel bracelet create a consistent metal appearance across the exterior. The 41 mm case diameter is a supplied measurement useful for comparing the watch against other sizes; it does not by itself establish how the watch fits a given wrist. Water resistance is rated at 5 ATM, indicating protection against incidental contact with water rather than swimming or diving. This example is used and in very good condition, and it is supplied as watch only, without the original box or papers.

Technical Specifications:

• Reference: 15407ST.OO.1220ST.01
• Case diameter: 41 mm
• Case and bracelet material: Stainless steel
• Movement: Automatic, caliber 3132
• Water resistance: 5 ATM
• Crystal: Sapphire
• Scope of delivery: Watch only, no original box or papers