Case: The case looks to have a chromed finish, so it won't be a steel Carrera case - it will be either from a Monza or a Modena (if that was available with the chrome case as well as the PVD one - do we have any info to say for sure?).

Hands: Those hands look correct for a Monza and, by extension, would also be for a Modena. Lume patina looks to match the dial, as far as I can tell from photos that size.

Crown and pushers: Hard to tell on the crown, but those pushers aren't right - they look to be smooth replacements for the original fluted ones. You can see that best in the third photo.

Tachy ring: Nope. That's a Carrera Tachy ring. In point of fact, it's the 200 to 50 Tachy ring that should have the word Tachy at 3 o'clock so it has been mounted incorrectly. As far as I'm aware, Monzas (and therefore also the Modena) only have a combination Tachy/Pulsometer ring and always in black.

Dial: The important one, I suppose. Markers look correct, subs look correct but then they would look the same on a Monza or the "no name" economy model. The Modena would be much rarer than either of those - I'd want a really big photo of that part of the dial to see that the Modena script looks original. Date window looks ok and has the frame it should have. "Automatic Chronograph" is present and correct, as is Swis... wait a moment. Are those little lines to either side of "Swiss"? Seen those on a Monza before? Or any "series" Heuer come to that? I don't think I have...

So. Could be a straight watch but a couple of pieces have definitely been replaced at some point. I'd want it under a loupe to be really sure, to be honest, or at the very least some very high-res photos - including one of the caseback, which should have a model ID on it.