10-26-2018, 01:16 PM
I have got the answer from KUTANI-YAKI expert as "We have never seen this kind of work or something like that". They agree with for the letters in the circle as "煙径：ENKEI; smoke path" but they have no idea what it is.
I searched google for "煙径" to reach this page.
Sorry to say, I can not find the information about this work. I'm sorry.