We regret that due to time constraints, we are unable to answer individual inquiries about the work of Eva Zeisel. We are the co-presidents for the Eva Zeisel forum www.evazeisel.org, and are also in the process of writing a book on Zeisel's designs. When that is published it will probably answer your question. In the meantime we do answer questions and make identifications for members of the Eva Zeisel forum.