Bit of a theoretical question here but would the accuracy of a given automatic/mechanical chonograph be determined by the accuracy of the movement itself? i.e. if a Valjoux 7750 is keeping time to +2s/d then the chonograph would also be accurate to the same error as its being driven by the same balance wheel, escapement, mainspring etc. I say this assuming there is nothing slowing or speeding the system up between the shared timekeeping heart of the movement and the gears driving the chronograph.
I would love the input of someone who knows their mechanical watch anatomy.
Is this answer different perhaps based on the movement itself i.e. perhaps yes for a Valjoux 7750 or Lemania 5100 but no for the Dubois Depraz modules?