I see the mark , but don't 'automatic-pilot' recognize it as an antique one .
Looks as if there was 'painting' over the glazed portions , such as the eyeballs , gold gilding , etc .
It's a bit of an oddball to my eyes , considering its' quality & value (which I have little clue about) , starting from the point that the bust is sitting atop an off-centered integral 'base' , and that the hand that did some of the post-glaze work was none too steady .
I'm betting there's a few like this kicking around the world !