Antique Porcelain Swivel Shower Head Retro Art Deco. Water runs through just fine. It measures 5" across x 6 1/8" long including the hardware.
The fitter diameter is 5/8. There is what looks like a small chip where the porcelain meets the metal. It is actually a manufacturing flaw in the glazing over a low spot. This design does not have hardware attached to the sprinkler area. I have washed it, so no surprise bugs will be found! Please review all of the photos as they are part of the description.