Valerie “Vally” Wieselthier (May 25, 1895-September 1, 1945) was an Austrian-American ceramic artist and designer.
Biography on [translated] Vienna History Wiki: https://bit.ly/3m7QzjE

Yak by Vally Wieselthier
1921 / Red pottery, polychrome glaze / 20-1/10″x16-1/2″ / Private collection

Vally Wieselthier on Artnet: http://www.artnet.com/artists/vally-wieselthier/

Further reading:
https://www.cincinnatiartmuseum.org/about/blog/curatorial-blog-5102019/
https://www.gseart.com/artist/vally-valerie-wieselthier/bio
https://translate.google.com/translate?sl=auto&tl=en&u=https://www.revistaad.es/diseno/iconos/articulos/razones-para-descubrir-vally-wieselthier-mejor-ceramista-vienesa/29493