Without re-reading all the posts in this thread, I believe that I've spotted three additional instruments in an old movie viewed this morning not previously mentioned here. These are seen in the 1958 SciFi flick From the Earth to the Moon based loosely on the Jules Verne classic.
During the adventurers' flight to the moon two scopes are clearly displayed aboard. In the observation room at the top of the ship there is what appears to be a classic 19th century brass refractor of 3.5"-4" aperture on an unusually large alt-azimuth, pillar-and-claw, mount. I would image that for the sake of visibility in the scene, this whole arrangement is seen sitting elevated atop a very substantial 4-foot wooden tripod.
Another scene shows a slightly smaller, but much more complex looking 19th century brass refractor and mount. This one, seen only briefly, looks to be 3" to 3.5" aperture and is attached to what appears to my eyes as a mount typically employed in meridian transit timings, with large brass azimuth and altitude circles. Where Hollywood ever landed its hands on one like that is difficult to say, perhaps at the observatory to be mentioned below.
The final instrument is shown several times within an large domed observatory. Earlier in the film only the upper end appears, looking skyward while tracking the just launched and moonbound spacecraft. Late in the movie we see it only from the eyepiece end. These scenes must have been shot in some actual Westcoast observatory, most likely Griffith Observatory/Planetarium in L.A., for the instrument is far too large and complex to be a simple stage prop, or anything but real. This would make sense as access to this facility would have been very easy and the big refactor shown does look to be around 12" in aperture.
BrooksObs