Been searching for this type of hanging lamp for awhile now and can't seem to find anything on the internet. Not sure how old it is and it seems to have little to none information on it.
Large Vintage White Milk Glass Globe Lampshade Ceiling Light Lamp Shade floral GBP 80
Approximately US $97.35
I think this lamp is from 1970s
This style lamp was generally called a 'swag' lamp and was popular in the 60s - 70s.
You may not find your exact lamp but there are many online in the same style.
You may have a difficult time finding that exact swag lamp but there are some listed on ebay:
www.ebay.com/
www.ebay.com/
I found identical metal fixture, but with different glass
It dates back to the 60s and 70s.
So, I think your vintage swag light is from the 60s 70s.
Similar vintage 8 Ivory Milk Glass Round Ball Floral Swag Light Shade Globe 4" Fitter is listed at $17.95
Old Vintage Milk Glass Globe Pendant Ceiling Light is listed at GBP 60, Approximately $69.17