These are different.
The veneer is thicker, much thicker; the colors are not a common Vitro color—close but less pronounced or vibrant.
The marbles have full coverage in most cases with no clear or whispy showing, although a few do have the recognizable Vitro clear with a wispy look.
These are from 4 different lots that I have hunted over the past 25 years. I have researched these to no end with no results. Please give me your ideas on these.
They are either old or newer, some of them do have an iridescence on the exterior that may be attributed to later versions such as earlier jabos—jaybos —I do not have a clue and have found no reference. I can say this—they are not common and they are very cool. Two sizes so far, 3/4'” and 5/8”.
Have no fear, I do not judge and I appreciate all of your input.
Thanks, Art