Rosenthal studio-line glass oval vase

Rosenthal studio-line glass oval vase
Made in Germany
Size: Approx 6” x 4 ½” x 9”
Mid Century Modern design

This is the "Structure" pattern, which has an organic form, an icicle type finish. I believe this date to the late 1960s and into the 1970s. acid etched with the Rosenthal mark on the bottom as shown.