I think what I like about this design is how you made it look like it could've come from the 1950's...as if Star Trek could've had their start there instead of the '60's.
You did say pre-TOS, and you captured that look with great success.
Visions of the future change with each decade. When Enterprise (later Star Trek Enterprise) came out, they had a heck of a time trying to make the technology look older than TOS technology, and yet look cooler than what we have in real-life present day. What you did was capture a look as if Enterprise had been conceived in the '50's, and did so very effectively....in my very humble opinion.