The book picture shows it on a Charles Parker frame (see last photo). Glass shade is in excellent condition. There is on tiny spot that is either a flaw or small little nick. You will see the picture with the red circled area. It's only about 1/16 long, very insignificant in my opinion.
Possibly a popped bubble from manufacturing process. Possibly some tiny tiny flea bites around the fitter but could also be from manufacturing, can't tell. Shade fitter is about 13 3/4 in diameter. Oil lamp font may not be original to this as it's a darker blue.
It is in good shape with some roughness on the bottom where it sits in the mount. Does not come with a burner or hurricane shade.
The frame is beautiful and has in it's somewhat recent history been re-plated. Will be packaged with great care. The item "Victorian Hanging Parlor Oil Lamp With Hobb's Blue Swirl Antique Art Glass Shade" is in sale since Tuesday, February 16, 2021. This item is in the category "Collectibles\Lamps, Lighting\Shades".The seller is "joand7456" and is located in Topeka, Kansas. This item can be shipped to United States.