As not a Carrera case, but the one from what I call the second economy series, encompassing the 7721/3/5 and 73321 etc. Hard to tell whether it's the steel or chrome-plated case in the shots, but it does look quite shiny in the dial front-on shot.

I might have raised an eyebrow at a grand GBP but $1000 doesn't seem so far off nowadays, particularly with Hamilton being arguably the best known and most well respected of the manufacturers using the Heuer parts. If you're still seeing any of them much under that, I'd definitely think about snapping them up!