Vase art pottery unterstab langenhessen 70s studio ceramics

Shapely mid-century vase manufactured by 'kunsttöpferei gudrun & ralf unterstab' langenhessen, east germany. Around late 1960s to 1970s. Black glaze in matt and glossy combined with intense blue. Marked on the bottom. Very good condition, no chips or cracks. Height 10.43" (26.5 cm), diameter stand 4.13" (10.5 cm), diameter top 4.25" (10.8 cm), weight 1000 gms.