This clock measures in at 15″ in diameter and is based on the Royal Oak Ultra Thin. I haven’t had a chance to put her on scales yet but she weighs a ton!
Notice the raised tapisserie surrounding the Audemars Piguet font.
If you look very closely, you can see the detailing even extends to the inner razor edge of the bezel.
It seems very unlikely that the crystal on the Ultra Thin is likewise sunk in so unless somebody says otherwise, I’ll just assume that AP followed design cues from other wall clocks (they typically have raised bezels) rather than be 100% true to the watch design.