Asian Experts please help with crackle ware brown impressed mark vase

This 12.2" x 9.25" heavy crackle ware vase with I think is a painted on metal overlay on the raised dragons and faces and the top and bottom rim has a brown impressed stamp on the bottom. I think the faces are very well done, not so much the dragons, but have no clue as to if Chinese, Japanese, Thai or Korean or what the metal painted overlay is. I used an acid stone and rubbed it on one of the faces and the silver acid turned red and it did not eat up the mark on the stone, but when I used a silver polish cloth, it did nothing, not even a mark on the cloth. Any ideas as to marking, county, if it could be metal painted overlay (which I think) or age?