I should have read about her before my first reply. What an amazing artist. Lehner show’s only one mark that they know of. A large F with the beginng of the F a slightly longer line. next to it a line beginning higher then the F line and ending at the 3rd line of the F. This mark was found on only one piece at an exhibit. From what I read, a lot was’nt marked. her ending of her clay pottery was her “signiture”. She had a lot of potter’s working with her and they are carring on her work. My question would be ‘did she make it or one of her student’s?

If it was made in the U.S.A it might be in Lehners book of pottery & porcelian. If you do not have this book I could look for you but I need a discription of mark or a picture would be better. Did she have a private studio or work for a company?