here is a loose translation of a post made on French watch discussion site Forumamontres by a watchmaker (Loup à l'Oeil) who had just finished servicing a vintage Vacheron Constantin watch with caliber 454. I thought it would be of interest to you to have the point of view of a watchmaker who obviously works on many different calibers from different brands.
Scans used with permission.
"As I screw the case back on, I wonder once you have a watch like this what can you want after? Not an easy choice! Everything you can hope for this caliber has: beveling, circular graining, polish, Geneva waves and all completely flawless. For fun I tried looking for a component which could have been better made, well... nada, nothing, niet. This watch is pure joy"
plate movement side, the big round hole is for the barrel, bottom right for the escapement. Notice the impecable perlage