Designed by Bjorn Sigurd Ostern for David Andersen. A great stylized and elegant pendant set with an amazonite central stone. The outer part is like a viking ship. The pendant is a little over 2" (5 cm) long by 1-3/4" (4.5cm) wide. The back of the pendant is marked David Andersen, Norway, Sterling 925S and INV. B.S.O. for Bjorn Sigurd Ostern as designer. This acknowledgment of the designer was rarely done and makes this piece more special. The pendant is in excellent condition. I have not cleaned or polished piece but will gladly do so if requested.