The Fisher AG7 has flown on every crewed NASA mission since Apollo 7, its pressurized ink writing upside down, underwater, and across temperature extremes that stall an ordinary ballpoint. This version swaps the usual chrome or matte black for uncoated brass, left to darken and spot with handling instead of staying showroom-shiny. Made in the USA, it ships with a medium-point PR4 cartridge in black ink.