When I saw this in the Paperweight forum, my initial thought was, "Could it be by Bertil Vallien?".
Vallien makes lots of head sculptures but the form and quality of this don't seem to fit with the Vallien ones I am aware of, as shown for example at:
http://www.bertilvallien.com/As Ivo says, I would expect a small, possibly hard to find, signature - probanbly on the edge of the base or low down on the side near the base.