This is the original Fisher Space Pen that was used on the Apollo 7 space mission in 1968 and has been used on all manned space flights since then.
Original Astronaut Space Pen, 50th-Anniversary Apollo 11, Special Edition (#AG7-50)
Axiom crews to use custom Fisher space pens on private missions
Original Astronaut Space Pen - Fisher Space Pen, Pen Box
Fisher Space Pen Takes Off Once Again
Fisher Space Pen Astronaut Pen with Space Shuttle Emblem (AG7SH) : : Office Products
Fisher Space Pen AG7 Original Astronaut Space Pen
FISHER Space Original Astronaut Space Pen
Charitybuzz: Limited Edition Flown in Space, AG7-BTN Fisher Space Pen
Space Pens, Pencils, and How NASA Takes Notes in Space