Hello Mark.
Great heirloom.
For some reason, the earliest date I associate with that style of marble is 1856. Not sure quite why that date sticks out in my mind, but it might be when a certain tool was invented related to the manufacture of glass marbles. Or maybe the beginning of one of the famous marble making factories.
It was made in Germany.
I'm less sure about the name of the style. I think maybe 4-panel onionskin. One of these days I really need to learn those names. Someone else should be by shortly to set that part of the story straight.