Not marked at all
– check if silver. To believe it’s 800 silver is not enough.
Zuckerdosen (sugar boxes) of this form were popular and common in Austria –Hungary, Germany, Poland etc. during Biedermeier period and later. This particular one has elements of Empire, indicating earlier Biedermeier. Judaica is always more lucrative but without and inscription in Hebrew there is no proof it’s meant to be an etrog box. Besides, I see no distinction between an ordinary Zuckerdosen and an etrog box unless there are obvious religious Hebrew features, which, by the way cannot be seen here (the finial, etc).
In a word, if there are no marks at all, I would give up searching for the country of origin, the maker, etc. Again, make sure if it’s not silver plated and enjoy your Continental sugar box.