The dial and bezel are correct and not all that uncommon. That dial is found on about a quarter of all steel 176.007s (more info) and the blue bezel is the one that is most associated with the silver dial (more info). I kind of take issue with their statement "While relatively rare, these unusual chronographs from Omega in honest condition don't come up often." Omega made about 20,000 of them (more info). I guess it depends on what they mean by "honest" and "often"...
Looks like a decent but not great example but hard to say without movement pics. The important visible parts (dial, bezel, case, hands) are all correct. The bracelet is probably not original. The bracelets normally had endpieces that fit the case (the one they are selling is a straight end), and the top end piece even looks too short....The price is pretty high for what it is but not shockingly so.
