I can tell the following if it helps:
It's kinda subjective but it looks to be the new movement at 28,800.
I haven't opened the caseback as I don't have necessary tools but I compared the movement of the stopwatch seconds hand to my other reps, which beat at 28800 for sure.
I could not see any difference.
Second, according to By-Tor the old movement beating at 21k6 had a problem that the stopwatch hour hand moved during the time when chronometer was stopped.
This is not a problem in the latest version.
My camera does not have a resolution high enough so you can't see many rings on every subdial that you can you in the picture of the genuine above.
The rings are there.
I don't see any pie-pan effect on the picture of the genuine so maybe there're two versions (???)
I can only say that this pie-pan effect is seen on the genuine dial I bought some time ago.
At present, I have only a picture of the dial as the dial itself is getting restored.
Have been testing the chronograph today, to see if it loses time when the chronograph is working.
Let you know the results this evening.
Hope it helps.