Hi!
I don't have so much knowledge about this early constellations...
I just wanted to tell that IMO the dial that is actually on the watch is legit itself..
Maybe they took it from another reference watch and so it is wrong on this reference. 😀
What did you base your opinion on?
A few signs to the contrary:
The letterings under the logo are not centered.
The whole dial is too clean for the watch, with messy green lume to boot.
There's no dial from any non-504 constellation models that would fit on cal 504, unless it's glued to the movement.