Sorry but the signature does not come together. Unica is not a Kosta term; they used U, Unik, Unikat or Unique. "B" is not an Kosta artist abbreviation; the number 609 could only refer to a model number, and if it does it is by definition not a unique piece. Also the signature is scrawled all over the bottom of the piece in stead of neatly needle engraved - so to me it looks as if the guy from Sheppey has been at it again. Maybe you could check it out with Kosta itself?