Kähler art pottery Large square pots from the 1970'es

Kähler art pottery. The blue is sold. Large square pots from the 1970'es. Height 21.0 cm., the top measures 17.0 by 16.5 cm. The yellow has a small hair line crack at top, see picture, otherwise perfect condition. The Blue has a few chips in glaze at bottom edge, see picture, otherwise perfect condition.