Hi Vladato - welcome to the Glass Message Board. We hope you have fun here.
The Rosenthal Studio Line mark was used in the 1960s and 1970s. The products were all designed by quite famous designers (Böhm, Wiinblatt, Wirkkala, Sarpaneva, Still, Vasárely to mention but a few) but it is almost impossible to match designer and product - other than by style. There is no book which covers the Rosenthal produce, it is mostly guesswork.
Your vase is a gorgeous lump of the finest crystal, and it looks Finnish - so Sarpaneva or Wirkkala may have had a hand in it.