Hi,
As Nicole has said, the label could be a hold over from the 1970's, and it looks like a 70's label. But I think the hat itself may also be 1970s (possibly 1980's). I have come across a few Leon hats through the years, with different labels, all dating from the 1960's if I recall correctly. None had that label as yours does.
I would call it a structured beret or modified beret. Both terms seem applicable. I know we usually think of a beret as soft, but they can have structure too and still fall into that category.
Splendora is simply the felt manufacturer's name for that particular type of specialty felt which they made and then sold to the hat maker who blocked it or finished it. I agree it looks like wool felt.
Very cute!