Hi,
Here is my opinion :
The condition of the case is quite correct but having those ugly inscriptions on the back is really a pity.
You are right I would be suspicious about the pushers too.
Also, the movement when looking closely has marks, particularly on the screws which makes me think it had poor handling.
Third point, the adjustment racket position is a (big) problem :
I would not buy. When looking for that kind of chronographs I think it is far better to look for a perfect one, even if the price is higher.