Light Fixture Found in my Grandparents Crawlspace

This light fixture was found in my grandfathers (born in 1904) crawlspace in about 1978.  It had apparently been there for quite a few decades from the time that he had remodeled the house.  The house originally belonged to my great grandfather (born in 1881).  The fixture was hanging in the parlor when my great grandfather lived in the house.  The house was located in Logan Utah.  Not interested in selling.  Just curious about how old it really is.