Another fluorescent version of a normally incandescent fixture

And here is another fluorescent version of a normally incandescent fixture. This one takes a glass drum like the last ones. However, unlike the last ones, the drum on this one is held on by a central pipe spud and a cap nut rather than three screws on the side. This fixture came as preheat fluorescent as soon as I found it. I also suspect it's an older fixture because most of the parts appeared to be older. It takes a 22 watt circline and came with an Ace cool white lamp.