Got a line on this from a private seller, but a couple of things raised my eyebrows:
1. I can't find any other Heuers in this configuration
2. I've never seen a Heuer bezel with the round indicator at 12 rather than the inverted triangle
3. It looks _exactly_ like a Lator from the same period (https://timepeaks.com/item/pr347/)
4. It's not signed Heuer anywhere else besides the dial (i.e. inside caseback), and the back is a blank screw-down .

The seller seems honest, and says his watchmaker never raised any issues of its authenticity. But still . . .

 

Not genuine imho

 

That was my first reaction, and then I started to see this case (T.K. Co.) show up in a whole range of brands--Elgin, Wittnauer, Rotary, etc. It makes it seem more feasible that Heuer would have jumped in as well, but hardly certain.
https://www.mwrforum.net/forums/showthread.php?40319-1960-1980-s-Watch-Case-Manufacturer-s

 

+1

Not born as a Heuer.


Out of interest what’s the asking price ?

 

Too much--$2150.

 

Ouch. Yes way over.

 

that looks like a Rotary Aquaplunge with Heuer Shield. Never seen that.

 

Dominicans in a Cuban wrapper!

 

Somebody just put Heuer on the dial.

This is not a real Heuer.