Nicolas,
You mention that the watch recalls the Patek Philippe Calatravas. I think I can see the elements that are evoking this association.
Is it possible that the key to this effect is the large ratio of dial-to-bezel that is common to both models (i.e., broad dial, narrow bezel)? Also, this 476 has more in common with the original 1932 Calatravas including the gently tapered lugs and the large ratio of crown diameter to case size.
However, I think there are some key respects in which this watch stands apart from the early Calatravas.
I'll add my own view that the white sector track on a dark dial is a gorgeous period addition, and the loss of sector contrast to patina might be the only respect in which age has caused the dial to lose some impact.
Omitting the Patek's Dauphine hands also improves the elegance of the dial, since Dauphines are visually massive and can overwhelm a small dial on a small watch. Also, the use of center seconds instead of the Patek's original small seconds subdial maintains balance, eliminates clutter, and makes the watch easier to read when timing an interval of seconds.
Finally, the use of dot hour indexes outboard of the sector's heavier white hour hash marks naturally draws the eye outward from center to bezel while consuming minimal space. It's a thoughtful effect that really opens up the dial and reduces the crowding that metal stick indexes (many Calatravas) can create on smaller dials such as this.
Best,
Tim