Very Nice bowl. Without marking that can be a task to find the maker and or cir. I would assume if it was marked at all, it was a paper or foil label that has long been washed away. Most really collectiable and sought after items are marked, but the real blessing is most will buy because of what it looks like, either it matches what they have or would look nice amongst their collection. You have a fancy and unique bowl, that would warrent some attention for sure. IMO this is not really that old, most likely post Depression 40's or 50's made for a export company, and was marked with a paper or foil label. Nice bowl non the less, I like it.