I was tempted, but someone else might find a better use, I think they are clay, good starting price
https://www.ebay.com/itm/Vintage-Bo...696671?hash=item341da5ae1f:g:ToMAAOSwIHpeElth
https://www.ebay.com/itm/Vintage-Bo...696671?hash=item341da5ae1f:g:ToMAAOSwIHpeElth