Can anyone help me identify this marking?

I picked this shade up by itself at a thrift store 10 years ago. For some reason I finally got curious about it today and tried to find anything similar on the internet which I was unable to do.

I looked closely at the top and there was a marking I hadn't noticed before.

"Jane" with little flourishes, but then I can't make out the end of the company marking.

"The GlassXXXX LTD"

Any thoughts would be appreciated, nice to look at all other fine lamps on the site!