Do we know what happened to the other two models? The "shortened" model used for Cinemascope shots and then other 22 foot 1/3rd model used for the surface ship attack high-speed, glowing lights scenes, plus a few others?
The "squeezed" Nautilus was more of a prototype that was never used in the final film. The 22ftr, was taken by someone for years and put in a pond, but it has since disappeared, probably destroyed.
Well, to be fair, it is an old, beat up, metal model that was heading to the trash before 2 fans got involved and saved it. The work was done by someone who had worked on planes. (Welding and such) among other various metal projects.