Hi Jim
Thanks for the link, it is good to know exactly what I have

There don't seem to be any marks, either visible or to feel.
I am happy to sell, please make me an offer as I really don't have any idea of the value of the base alone. As you have more knowledge of fairy lamps than me then I will leave it to you to offer a reasonable amount

The base does have a small chip on one corner which can just be made out in the photos if you look closely, and it has a few marks which look like inground dirt, but overall it is is in good condition given it's age.