This seal is Kim Gu’s (1876-1949) private seal made of yellow line stone-like gem on the upper part of which an earless seal was carved. When he returned to Korea from China after the 1945 Liberation, this seal had been used. On his name cards set to Kim Sang-jeong and Jeong In-bo and on his own photo sent to An Chang-ho, this seal was affixed and this has a great material value.