The glaze is thick with "holes" and have the look of white icing. Could it be ash glaze?
The form is very fine and classic as well.
My only problem with this piece is that I don´t know who made it. I assume it´s Danish but could of course be mistaken. The signature is very hard to make sense of and I looked through all available books in my home libary. No luck.
I might have turned it upside down but this was the way it made most sense.
Have you seen this signature before?