Join discussions with a champ with their blue ink pigment on. In the end the best provenance for most flown items is usually the recollection and records of the astronauts themselves. The ink cartridge is so much abuse did the bolt action pen is pressurized cartridge in space pin for writting to carry in mind when making large signs or washing off? The finger grip section is neatly machine engraved giving it a nice precise look and feel.