Glass floral etched electric lamp

I found this at a thrift store looking really yellowed and filthy. Brought it home and it cleaned up very nicely. An electric lamp with no chips or cracks. It measures just under 12" high and under 6" diameter at the opening. It has a beautiful etched floral satin pattern all around. The piece itself is one whole piece, not two. This piece is seamless. There are no markings of any kind as of who its made by.

I can't find anything anywhere to tell me approximately how old this is. Any info is greatly appreciated. Thanks for looking.