some years ago I bought this rectangular glass vase (height 18cm), brown streaks in clear glass, label reading "Leichlingen Germany".
In the book "20th century factory glass" it says Glashuette Leichlingen was aquired by Gral-Glas in 1959. So is this a Gral-Glas vase made in Leichlingen?
Could you help me with designer, date of production etc.?
Thank you very much,