Vintage Pressed / Cut? Glass Hook Neck Electric Wall Sconce Light Fixture

Description

Offering for your consideration is this
Vintage, probably Antique Glass Electric Wall Sconce.
The sconce is in excellent condition for its age with a chip on the top near the hole for wall hanging, probably a result of removing from the wall hanger.  There is also a 2 inch square piece of mirror on the wall section of the glass behind the hook that is black spotted as a result of de-silvering.  The original candle sleeve; cotton wrapped cord and 2 prong plug are all indicative of an age of 1930 or earlier but there are no makers marks or dates anywhere to be found.  When
I purchased this at a yard sale several years ago, I was told it dated to the 1920's or early 30's.
The lamp works but I never used for a light at my house due to concern of the old wiring.  The hook neck and other assembly pieces are metal with lots of patina so I am not sure the type.  I believe this to be pressed glassed as there appears to be a mold line in one location
BUT
the glass is heavier than most pressed (1 pound 6 ounces) and appears to contain some lead since it glows a definite yellow green color when tested with a black light (see last photo).  The piece without a shade is about
8 inches high x 4"W x 6"
projection from wall.  It is turned on and off with a rotary switch that has an L embossed on the round plastic knob.  The cord is very stiff and measures about  53" in length.  It has very minimal fraying in one or two locations. Both prongs of the plug is the same size and are embossed with G57 LBR 660 250.  When I purchased the fixture, it did not have a shade and the one I used and the light bulb were for display only.
*
Please
note that my items are
VINTAGE
and most have age related wear.  I am not an expert, only an admirer of the items that I remember from earlier times....Each item that I sell is at least
20
years
old and some are
up to 70+ years old,
which means me or someone at one point owned and loved it--so when you are bidding remember it is
NOT NEW
.  I try to give an accurate description and include photos to help describe the item.  If you have questions, just send me a message and I will get back to you as soon as possible.
If you are pleased with the items, I would love to have your positive feedback. If you are unhappy with the item, I hope you will contact me immediately so we can work toward resolving your issues.