Welcome to the Board, Royo.
I have merged your two threads into one. You can simply add replies to your own posts to provide extra info.
Also, it would be useful to show photos of the whole item, usually with top, side and base views. And sizes for height / width are useful too.
That way, even if the signature / logo is not recognized, the style and techniques of the item could be. Also it is helpful for other people's research to see examples of items that might give a clue to their own, especially if theirs is not marked in any way.