Vintage Black Ceramic Vases from Carlo Zauli, 1960s, Set of 2

This pair of glazed ceramic vases was manufactured by the pottery master Carlo Zauli in the 1960s. Irregular and rough surface is the hallmark of the artist.
Measure:
small vase: d. cm 6,6 x 23,4 h.
tall vase: d. cm 6 x 28 h. This piece has an attribution mark,
I am sure that it is completely authentic and take full responsibility for any authenticity
issues arising from misattribution