16mm film sequence during a drive on the Lunar Rover. It is likely from EVA2 "Apollo 15 experienced problems with the 16mm sequence camera on the lunar surface. At the crew debriefing, Jim Irwin said "Of all the ones [film magazines] we tried on the surface only one drove...""
NASA
Taken on 1 August 1971
Taken from Spacecraftfilms.com DVD "Apollo 15: The Great Explorations Begin"