So my daughter and I was browsing an antique shop and I happened to see these and thought they may be German handmade marbles. Still relatively new to collecting I sent pictures to my son and he confirmed they were probably handmade. After getting them out of the case, I noticed, they all had flat spots on them like someone had ground them to make paperweights. To make a long story short, they are were put on high end, piano stool legs. Most were just clear glass. I’m happy to say I had a collector look at them says they are truly German made Laticina swirls maybe not worth as much as they would be without the flat spots, but still collectible.
B-rett