Height 3 1/2 width 4"
My wife's mother owned it and we got it after her passing.
A Tenmoku glazed modern Chawan from Japan. Tenmuke glazes are attempts of Japanese potters to copy Chinese Song Dynasty glazes. Mark is again unclear. Really good made glaze so it little unfortunately I could not find the maker because he really knows ' his business' . Due to the good quality my estimation is above the average of a 'normal' glazed Chawan.
Regards,
Simon Breider