Audemars Piguet Royal Oak 15400 – Finish Restoration & Polishing

Audemars Piguet watches—and especially the Royal Oakseries —are not simply mechanical objects of high horology. They are miniature sculptures made of steel. The octagonal case, sharp angles, mirrors on the sloping surfaces, and characteristic grain brushing require absolute precision to maintain the original architecture designed by Gérald Genta. Every intervention in the finishing must respect this geometry.

This particular Royal Oak 15400 arrived at the workshop in a visibly worn condition: deep lines on the bezel, uneven brushing, dents on the lug edges, and extensive wear on the bracelet. The photos taken before the work began show surfaces that had lost their sharp edges, small deformations in the brushing, and intense "shadows" on the polished beveled sides of the bezel. The result was a watch that had lost the characteristic three-dimensional clarity that distinguishes a Royal Oak.

Disassembly & Preparation

The process began with the complete disassembly of the case and bracelet, separating the bezel, middle case, caseback, screws, link-by-link elements, and intermediate surfaces. This allows the finishing to be done correctly on each separate surface, without "breaks" in the linearity of the lines and without rounding of the edges.

At this stage, all the deeper damage was revealed: dents on the shoulders, scratches on the slanted polished surfaces, but also significant biological residue and patina inside the frame.

Geometry Restoration – The Most Critical Stage

On a watch like the 15400, polishing isn't just a process of "removing scratches." It's a re-engraving of the original architecture.
So, it was done:

• Restore the edges without rounding, keeping the sharp lines of the octagon.
• Correcting the surface of the bezel so that the mirror polish on the slanted sides is uniform and reflects a clear image without distortion.
• Homogenization of the brushing direction on the upper part of the frame and on the links of the bracelet, with perfectly parallel engraving.
• Local removal of material in deep dents, taking care not to alter the symmetry of the surfaces.

The results in the intermediate photos speak for themselves: the bezel regains its perfectly mirror-like shine, the edges shine brightly, and the brushing returns to its factory-fresh fine line.

Bezel, case, bracelet – The final finish

After being worked by hand, each piece underwent a final check for alignment and minor corrections. The bracelet, which initially had visible irregularities and lines in many directions, regained its factory texture.

The final result is characteristic of a Royal Oak in its true form:

• Perfectly sharp edges
• Uniform satin brushing
• Beveled mirror-polished sides with flawless light play
• Braselle with factory-level lines and harmony from link to link

In the latest photos, the watch looks like it has been transported back in time, with the aesthetic purity one would expect from an AP.

Our philosophy at The-Watchmaker

Restoring a Royal Oak is not a simple routine task. It is a combination of technique, precision, and respect for the object. In our workshop, each watch is treated as unique: methodical, meticulous, and controlled at every stage, from disassembly to final finishing.

This particular 15400 was returned to its owner, regaining its original identity—the sharp lines, clean architecture, and elegance that make the Royal Oak one of the most iconic designs of all time.