That my dear Greg is the Trumpeter Object 450:
I built it for the “Best Tank That Never Was” campaign - still running, but I also opened up a separate thread as:
I’m not sure I’ve linked this in the most efficient way; however, it was a Morozov design (he who had formulated the formidable T-64) and was awarded the designation T-74, but obviously never came to fruition.
It was also never built as a prototype either, or as far as I can find out. What Trumpeter did was to make a model of a model that the Sovs had made. What I did, and it was quite a bit of modelling fun, was to sort of regularise it as thought it had been a prototype, and added all sorts of things yet tried to keep within the bounds of plausibility.
I’d direct you to either of the two topics if you want to find out a bit more - I think I included as much as I could yet still make it lucid. That’s not to deny you any more info here, but I do bang on a fair bit(!)
Thanks for the interest; here’s an overall shot:

