MCM Crystal Art Glass Straight Line Cut Engraved Bowl Scandinavian? Help Identify.

Needing some help if anyone can Identify the maker of this very high Quality Cut Glass Bowl. Fairly Simple straight line vertical cuts. Highly polished with some cut facets around the lower half. Surprisingly it is Unmarked! It is quite heavy, thick glass and water clear. There is a good amount of bottom wear so I am thinking at least 60's. Only found a couple designs that are close to this and they were both Scandinavian. One was various Tapio Wirkkala pieces. They are so very much the same....but they are signed and I could not find this piece. Any opinions or leads would be wonderful. The bowl measures 9-3/4" in Diameter and stands 3-1/2" tall weighing just under 3 lbs.