I think this was going to be the Excelsior... http://ottens.co.uk/forgottentrek/designing-the-excelsior/
Huh? Wasn't this the design that ultimately ended up becoming the Reliant from TWOK when the producer who was shown this image liked it the way he saw it and approved it, even though he was looking at it bottoms up? Also, note how the nacelles resemble those later used on the Oberth class.
Trekyards just did an episode on this design. I hadn't thought about this model in years so boy was I surprised when the thumbnail popped up on my front page:
Seconded! That and other study models https://vignette1.wikia.nocookie.ne...dth-down/180?cb=20110902230911&path-prefix=en
I'd just like to mention that this is what my Bozeman actually looked like. That bit we did with the crew of the -D was a dramatic reenactment done on a tight schedule and they used a model that was close at hand.