This wooden end cap finished one of the nacelles, or fictional propulsion units, when the 11-foot model of the Star Trek starship Enterprise was first built. Between December 1964 and the end of its filming in 1968, the model underwent several significant changes, including the addition of internal lighting, which required changing the forward ends of the nacelles. Richard C. Datin, Jr., who made those changes to the model, kept the end caps, which had been colored red by Enterprise designer, Walter Matthews "Matt" Jefferies.
Datin's family donated the end cap to the Museum in 2016.
This object is on display in Boeing Milestones of Flight Hall at the National Air and Space Museum in Washington, DC.