I'd say you're jumping right into the deep end of the pool.
😀 Even the experts get fooled by frankens and redials on these late-30s chronographs. Unscrupulous dealers will swap out movements from functioning watches with knackered dials into broken watches with great dials, and no one ever knows unless you've also kept a database of movement serial numbers and their corresponding dials and cases. And, because these watches are valuable, the redialers have become crazy good at cranking out aftermarket dials.
That being said, if you're seriously contemplating this watch, let's call
@mac_omega who is one of our forum experts on these watches.
For the $30,000 to $40,000 that you'll drop on that watch, it should at least come to you completely serviced and well regulated, but even from the tiny photos above you should be able to tell that your watch is out of adjustment. If you're buying from a dealer and they're telling you the watch is serviced, that should be a warning (buy the seller).
You will need much better (bigger) photos to check the movement for missing or replacement parts. It is not unheard of for levers to have been replaced by bent paper clips, for screwheads to be stripped, for column wheels to have broken teeth.
As it happens, a watch similar to yours
was sold last year. Looking at pictures of that watch will allow you to compare and contrast against yours. Study them carefully. For posterity, I have included them here:
Note that the movement serial of the second watch is similar to your example, which suggests the movement on your example has not been swapped and is likely original to the watch. The cases are both sharp. The dial fonts and scale colors look very similar, suggesting that the dial on your example has not been tampered with. The hands are different, but both styles are correct for chronographs of that era.