Probably Austria, Prince Eugene of Savoy- Carignano was a Field Marshal of the Holy Roman Empire, under the Hapsburg dynasty. Most famous in his day for the 1697 Battle of Zenta, a major defeat for the Ottoman Empire.
I can’t comment on the origin of this piece but it also has an English hallmark - a Birmingham import mark for 1902 with the sponsor’s/importer’s mark of I S Greenberg.
Phil