Apollo 15 (July 26 - August 7, 1971) was the fourth manned lunar landing mission and marked the first of the three "J" missions designed to conduct exploration of the Moon over longer periods, greater ranges, and with more instruments for scientific data acquisition than on previous flights. David Scott and James Irwin lived on the Moon for 66 hours and 54 minutes (10 hours and 36 minutes of which were outside the Lunar Module Falcon) while Al Worden orbited the Moon inside the Command Module Endeavor.

The attached segment of 14 track, Mylar magnetic tape was cut from the Apollo 15 onboard Data Storage recorder reel. Used to record audio and data information during powered phases of the mission (for later playback to Earth), the tape could still contain the voices of the crew. After the flight, the unit was removed from Endeavor by Rockwell engineers for evaluation.