A studio shot from the period of the second pilot I believe showing the large Enterprise on a stand in front of the blue screen. Two technicians are visible, one clearly without a shirt. I have read that the studio was quite hot, particularly under the lights. Also visible in the shot is the end of the camera dolly rails and the blue painted stand.
For the fourth-season Enterprise episode “Through the Mirror Darkly,” producers built a TOS-era bridge for the U.S.S. Defiant. Notice the protective plastic sheeting around the bridge chairs. Classic.
(via Treksinscifi.com)
