Sunburst?
Well not quite--maybe a run of the mill.
The thing is with Master vs Asian is not just the seams but the glass and the construction as well.
A few folds here and there will push it towards an Asian made.
The finish on the seams will always push it towards a Master for me. Not Master Glass but Master Made.
This one has a few as-made little indents or inverse little bubbles that I associate with Master made marbles.
The pocket wear is what I would expect to see in a Master.
Master Made Marbles made some of the finest ever to compete with the Stone agates that all glass marble makers were competing with at the time.
They held up to a lot of abuse.
It is hard to find a really beat up Master Made Marble in my experience .
This is all of course my humble opinion.
Marble—On!!