Hello! Thank you for your interest
The inside of the neck is perfectly smooth and shiny (as shiny as the outside)...
As for the base, it is completely flat. There are only a few scatches from wear... maybe even too few to be anything 'old'?
Whatever it is, I think it's absolutely lovely -- and much prettier in real life than what I have captured in the pictures.
But I'm still interested in the maker
Maybe someone will know something? Anything?
All the best!