This "Rocket" model felt-tipped marker was carried by astronauts on the Apollo 11 mission in July 1969. NASA purchased a number of these markers from the Duro Pen Company for use by astronauts during the Apollo and Skylab program. It is constructed with a chrome body and typical "felt" tip. It also has a small velcro tab attached to keep it secure in the weightless environment.
NASA transferred this pen to the Museum in 1971.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.