Yep. I have a Raymond Weil with a PVD back (had it at least 10 years as well, so Kev - not only is what you say not so, but it hasn’t been so for a very long time).
I also have a couple of Dreyfuss (part of the Rotary group) chrono watches with both PVD backs and ETA 7750s in them. By what I hear on IW, these aren’t the mid-range workhorse chronographs I thought they were (basically the ETA Valjoux 7750 was designed as a non column-wheel chronograph, to save on cost, and even had some plastic components in early models, again to save cost). Oh no. These are ‘luxury’ timepieces, impossible to buy any more (except from Tissot, Certina, Hamilton, Longines etc etc). And obviously, the PVD backs must be a figment of my imagination.
I was given a different Dreyfuss when I left work, with a 2824-2 in it and a hunter case - the back of this is also rose gold PVD.
I do wish these ’experts’ would actually know something about their products…