Glass manufacturer Knittel productions in Germany are very rare to find and are at the top of my list!
Made of the highest quality lead crystal (30%) that only the best glass factories and well-known brands such as Waterford, Baccarat, Saint Louis or Swarovski work with. Their work is of the highest level. These highly refined glasses appear to be from the Colleen range of Waterford. However, they are not signed.
These glasses are attributed to another quality manufacturer Knittel. Not so well known but maybe even made a little nicer.