Thanks to @2001_italia & @Ushabye for the heads up, looks like a genuine screen-used Space Station V docking bay prop from Kubrick's 2001: A SPACE ODYSSEY has surfaced from someone's private collection; fully restored & on display here: https://www.reddit.com/r/StanleyKubrick/comments/kvkp64/original_space_station_v_docking_bay_surfaced/

Here is a thread of modelers discussing it, where the guy who restored it and built the display case for it shows up and offers this video highlighting the work he did https://www.facebook.com/groups/starshipmodeler/permalink/10157533747246319

Here is the scene where you can see the whole model, as well as this specific prop section (inside and outside)

Here's where it gets interesting.. the rest of the Space Station V model was found abandoned in a dump nearly 50 years ago; as you can see from the pics taken, specifically the 3rd pic here, this section of the prop was missing even then https://www.refocusedmedia.com/post/115334062660/rare-look-at-an-abandoned-space-station-v-prop