I think you’ll find that most of them have the usual amateur ‘improvements’ made when they were readily available in the surpus shops – removal of the DF circuitry and installation of a mains power supply being very typical. Complete unmodified examples are much harder to find.
Andy

And that one has certainly been messed about with Andy. You can see an S-meter just on the right hand side of the magic eye and some of those controls are later additions. I’m pretty sure that it’s the one that was on ebay a couple or so weeks ago for a silly price but it looked in even worse condition than mine, which is saying something!