【Overview】 The Geha 4-Color Ballpoint Pen Demonstrator is a transparent-bodied version of the Geha 4-color ballpoint pen. It's popular because you can see the ink refills inside and identify their colors. The Geha 4-Color Ballpoint Pen Demonstrator maintains the basic functions of the Geha 4-color ballpoint pen while adding a transparent barrel design for a more luxurious finish. 【Details】 It works without any problems. There is some dirt inside due to its vintage nature. I was using LAMY refills. 【Notes】 ・Please understand that this is a used item before purchasing. ・Please see my profile.