Setting aside the morality for a moment - I can see both positions - and assuming it's legal to copy these circuits the way they're being cloned all over, this device is a total, deliberate attempt at misrepresentation. You can argue about where the line is where it becomes OK to call something a copy. Certainly original or historically correct transformers are important. This gizmo trades on the ignorance of the people who would buy it. Correct me if I'm wrong, but isn't the preamp identical in the 1064, 1066, 1073, 1081, 1084, and 1095 units? A BA183 or BA283 board, the transformers, the transistors and the gain control. Slap the number 73 on something and it's supposed to be magical. I have a 1064 and I prefer it to the 1073s I've used. I don't know why. I also have some clones I've built with original BA183 boards and copies of BA183s and they all sound fine. But the transformers, transistors, and gain staging are all the same.
I remember lurking on certain forums where people tend to call each other out for sport, and reading one conversation where a guy called out another guy on why old Neves sound the way they do. So the knucklehead who doesn't know when to shut up says something about the "custom Neve chips." And we're not talking about VRs here, I'm sure the guy had never heard of them. Later he gets called out on what makes an amplifier class A, and he says, "Well, I know it has to pass a lot of stringent tests..." Those are the people who will buy this thing and congratulate themselves for getting a smart deal.