Fisher SPACEPEN B1 Original Shuttle Style Pen NASA Writes Underwater New in Box

Fisher SPACEPEN B1 Original Shuttle Style Pen NASA Writes Underwater New in Box the only ball pen used on the moon the only ball pen that writes UP... without stopping Ultra-hard tungsten carbide ball Sliding float separates ink from gas Gas plug Stainless steel, precision-machined delivers instant uniform ink flow. Thixotropic ink in hermetically sealed and pressurized reservoir writes 3 times longer. Ink will not dry out in 100 years! Writes under water and over grease at-50° to + 400°