The glossy glaze also indicates another place of production than China. All this indicates Japan as the place of production. The mark itself, finally, seems to consist of a Japanese square flag combined with the old Chinese triangular Imperial flag. All in all this is a nice and interesting piece, and the curious mark makes it even more interesting. This information is given as an example of private conversation only and is not intended to be used as a promotion of any individual piece.
All opinions is the authors and is given as such with all hazards of judging anything from a photo.