This vintage Rapidograph Polygraph 3065HO KOH-I-NOOR Pen ink Combi Germany - Open Box is a wonderful item for collectors and professionals alike. It comes from a time when draftsmanship was an art form, and the quality of the tools was paramount to the precision of the image. This specific pen ink is of the highest caliber, and it has not been used.

This is for the ink pictured thanks to