This ink pen, made by the Fisher Company for use in zero gravity, was flown aboard Skylab by the SL-3 crew logging over 24.5 million miles during their 585 orbits of the Earth. It was then presented by the crew to astronaut Karl Henize as a memento for his mission support efforts. The pen was engraved by NASA: P/N SEB12100051-208, S/N 1278. It was given to Henize attached to a wooden base with other flown items from the mission and a metal plaque signed by 'Alan', 'Owen' and 'Jack'.