These three vases belong to the Zyklon series, designed by the designer Cari Zalloni for the Steuler ceramics factory near Coblenz at the beginning of his career
in the 60's.
The cobalt blue glaze has a gradation of tint from light to almost black.
The larger vase is
H: 20 cm x 12.5 cm x 8.5 cm stamped 193/20 840 gr
The middle vase is
H:16 cm x 12.50 cm x 5.8 cm stamped 191/15 184 gr
The small vase is
H: 11 cm x 7 cm x 3.8 cm stamped 190/10 416 gr