There's a label attached to the lead which says Waltham Lighting. They are unusual, I've only seen a couple for sale in the past, I know a couple of members on here have these lamps.
I would keep it but I'm limiting my collection to Crestworth/Mathmos and my Husband is saying I've got too many lamps lol.
While you're looking at these, have a look on eBay - http://cgi.ebay.co.uk/STUNNING-RETRO-SKITTLE-SHAPED-GLITTER-LAMP-RA...
A nice set of Glitter Skittles......wish I was selling them!
But my missus wants to hang onto our two sets!! Haha!