Signed olive green pyrity sandstone tea

Teapot or pitcher with artisanal pyrity sandstone lid olive green with a hollow ripple decoration on a darker brown stripe, stamped under the handle (but I did not find the name of the ceramicist). Very contrasted material, deep color, perfect condition no shine or crack, small imperfections of enamel because handmade and even here there is the trace of the fingers of the craftsman (5 lacks of enamel when he soaked the piece in enamel) on the bottom of the pourer. Total height 18cm, depth 15cm, width with 16cm handle.