I have a small collection of lightweight tumblers, wine glasses and stemmed bowls, all bought from the same very inexpensive shop over a period of months. They either have a classical Greek key pattern etched on the surface or a more elaborate etched design. I know nothing about them. The six tumblers (one pictured) are much the same size and shape, the two wine glasses look like they could be Luminarc or Ravenhead, except for the pattern. I have two stemmed bowls, both identical to one another.
Are they collectable, worthless, valuable ? Do you have anything similar? Thankyou.