I recently finished making a model of the Hale 200 inch telescope on Mount Palomar. Here is a video https://youtu.be/xCQCpob6erU .
In this image it’s the one on the left. Also shown is a wonderful Barry Crist model of the 100 inch on Mount Wilson. I also made working 1:64 models of the Yerkes 40 inch Alvan Clark refractor and the Hubble Space Telescope. These are all at the same 1:64 scale. The three models I made are all of aluminum and are fully functional small telescopes. More details about making the Hale model is here: Making the Hale Model