The crown at the top of this chair is carved separately and set on, and where it is set decides whether the whole chair looks right.
A crest ornament sitting dead on the centre line at the exact top of the back looks correct on the bench and slightly wrong on the chair, because a tall back is almost always seen from slightly below and the crown then appears to lean away from the viewer.
So our artisans pitch the crown forward by a small angle and set it a fraction lower than the true apex, which brings it upright to the eye of someone standing in front of the chair. The angle depends on the height of the back - taller chairs need more of it.
The same reasoning governs the gilding. The crown is burnished brightest on its front-facing surfaces and left quieter on top, because the top is the one part nobody will ever see from the floor. Effort is spent where it will be looked at, which is the whole discipline of finishing a tall piece.