One of the largest technical schematics in private hands ever used by Man on the Moon!
Each of the Lunar Modules was equipped with a set of technical diagrams.
This diagram, measuring over two-feet long, details the lighting system of the Lunar Module "Orion"!
Had the LM's lighting system failed on the Moon, the astronauts would have referenced
this diagram to troubleshoot the problem!
The schematic has been properly flight-certified by
Charles M. Duke, Jr., whose certification-certificate is included.
The Diagram was just inscribed by
John Young as mission commander,
making this one of the few lunar-surface artifacts we know of
from any mission signed by both Moonwalkers!