Unused, stored at home. Opened for photography. Due to long-term storage, the ink may be dried up, and it does not write. Please purchase if you are someone who can replace the ballpoint pen refill and use it. Shaft diameter 13.8mm (maximum diameter) designed for neck, shoulder, and arm syndrome. An ergonomic writing instrument that can be held without strain. Supervised by Dr. Udo Dr. Udo, a lecturer at Hiroshima University School of Medicine, scientifically demonstrated that this shape reduces strain on muscles. Dr. Udo's research was featured on TV and other media, receiving a great response. #DrGrip #Pilot #MadeInJapan #Rare #Retro #Discontinued