Graf von Faber-Castell Guilloche Rollerball Black Kaweco DIA2 TWSBI Diamond Ink bottle is

TWSBI Diamond Ink bottle is a glass bottle with anodized aluminum top and perfect for any lover of fountain pens and inks

Theserial number is engraved on the dome

Steel nib unit with feeder and threaded housing

High-quality resin

Greyish Blue

Graf von Faber-Castell Guilloche Rollerball Black Kaweco DIA2 TWSBI Diamond Ink bottle isThe Graf von Faber Castell Guilloche Rollerball is made from precious resin and engraved individually using a method normally reserved for jewellery. A hand lacquered and polished barrel places textures side by side, and since each is handmade by a craftsman, no two implements are identical. The coloured barrels of these writing instruments are made of precious resin with a special Guilloche pattern engraved on them. Manual polishing and lacquering