royal oak chronograph movement

[chmk]

hi giuys! looking to get a 41mm royal oak chronograph 26331st

i know its not an inhouse movement, but rather a piguet 1185 ebauche that is tweaked and modified inhouse (for example the addition of a gold rotor).

was wondering however if anyone knew if the movement was also finished inhouse by AP or by blancpain instead before being shipped to AP? im guessing the former?

thanks!