Trio of ceramic vases shaped like tree trunks, signed and numbered

Trio of ceramic vases shaped like tree trunks, signed and numbered. Very nice trio of black ceramic vases representing tree trunks. 1 vase is signed (corund, to be identified), a second is numbered 97/105 and signed, the third is only signed. In very good condition. One of the vases has small chips on the neck of the upper trunk. Height: 11 cm - 4.33" Width: 11 cm - 4.33" Depth: 5 cm - 1.96" Weight: 520 g.