Astral Lamp; American, Brass Shaft, Marble Base, Grape Cut Glass Shade, 19.5 inch.

I have here a Astral Whale Oil Lamp that has been in my family for a very long time.  I believe it was originally purchased by my grandmother, perhaps great-grandmother.  It stands 19.5 inches tall, has a mushroom-top cut glass shade (grapes), and is brass with a marble base.  The lowest part of the base which attaches to the marble is a slightly lighter shade metal, so not sure whether it is all brass or not.  There are 12 sets of hanging crystals.  The metal pins that hold these together and hangers are deteriorated and damaged in places as you can see by the photos.  There is one spot where someone attempted to fix with stranded wire.  The font is unmarked.