Crafted in 18-carat yellow gold, the 39mm case measures just 8.1mm thick and is fitted with glareproofed sapphire crystal on both the front and the caseback. Water resistance is rated to 50 metres, while the case back reveals a special rotor engraved with the "One of Fifty" legend, marking its place within a closely numbered limited run.
The green dial carries the signature "Petite Tapisserie" pattern, complemented by yellow gold applied hour-markers and Royal Oak hands finished with a luminescent coating. The interplay between the rich green surface and warm yellow gold hardware gives the dial a distinctly refined character.
An 18-carat yellow gold bracelet secured by an AP folding clasp completes the piece, maintaining the seamless visual continuity between case and bracelet that defines the Royal Oak lineage. Reference 15205BA.OO.1240BA.01 stands as a purposefully restrained yet striking variant within the Extra-Thin family.
