Hard to say. I can’t remember ever seeing one in this condition, plus this is the stainless version (some were plated brass). I’d say £600 would have been a steal. The price it went for was still a great deal.
I just think it’s a superb design that watch. It has the hallmarks of a mid-40’s watch, it’s relatively large for its age, plus it has some unique JLC style features.
Another will turn up.