Very interesting a confusing mix of familiar elements. Look in at the double headed bird at the pommel might provide a clue. The knife does not appear to be from any of the European countries that use the double headed eagle. However there is use of a double headed bird among certain Christians in China { Catholic Order of Saint Augustine} which is believed to still exists in China presently. The knife looks new. Catholic followers of Order of Saint Augustine might be worth investigating? what regions are active?
https://www.franciscanmedia.org/sain...nd-companions/
Also an antiquity from China in the Metropolitan Museum which show the eagle with the crown and it looks like there is a visual device depicting a crown on your knife above the double headed bird.
https://www.metmuseum.org/art/collection/search/680974