The Earth Spacedock is probably one of my favourite models used in Star Trek. It made its début in the film Star Trek III: The Search for Spock. The footage filmed was then reused for the The Next Generation episode "11001001", although the model stood in for Starbase 74. The same footage continued to be recycled as Lya Station Alpha, Starbase 84, and Starbase 133.
For reference purposes, I have compiled all of its appearances in the Star Trek films. Design credits go to David Carson and Nilo Rodis at Industrial Light & Magic. All copyright to Paramount Pictures. This is a fair use video.
00:00 Star Trek III The Search for Spock
02:25 Star Trek III The Search for Spock
08:38 Star Trek IV The Voyage Home
09:19 Star Trek IV The Voyage Home
09:32 Star Trek IV The Voyage Home
10:56 Star Trek V The Final Frontier
11:20 Star Trek VI The Undiscovered Country