Hi,
I've had this very fine quality Japanese porcelain vase for some time now, however, I've never been able to figure out the unusual four sided diamond shape mark on the base. I guess it's a maker's mark, but I've yet to see another example. The mark is also impressed into the base - it doesn't appear to be a Japanese character, neither Kanji nor Hiragama so does anyone have a clue?
Thanks,
Steven