Ah right ok, interesting information there, thank you for that. It does say on it warning usf only paraffin. There is also a little symbol on it but i can't make out what it is.
It is a very nice lamp. My mum in law gave it to me as its the sort of things i like, and i will keep it in the family. It belonged to my father in law, and she knows he had it back in the 80's, might have been before that, but she doesn't know. so its a good few years old.
Thank you again, at least now i have a better idea about its history :)
ps have you any idea what the number stamped on it will be please? its got No. HS2516