Lunar flown Lunar Rover Drive Control Electronics schematic from the Apollo 16 Lunar Module Systems Data Book carried to the surface of the moon aboard the LM Orion, one page, 38 x 10.5, signed and flight-certified in black ballpoint, "This schematic depicting our lunar-rover drive control electronics was a part of our LM systems data book. It was to be used as a reference if trouble arose on the lunar surface. It remained on the lunar surface for almost 72 hours. Charlie Duke, Apollo 16 LMP." Issued as drawing No. 4.8, page 4-11 for "LRV, Apollo 16," this schematic shows the lunar rover drive control and the corresponding signal flow between its various parts and components, such as hand controller, drive power, power transistors, monitor control relays, throttle fail safe circuits, and wheel traction drive electronics assembly. In fine condition. Accompanied by a signed certificate of authenticity from Duke, dated September 29, 2016, in part: "This Drive Control Electronics Signal Flow schematic for the Lunar Rover was carried to the surface of the moon onboard the Apollo 16 Lunar Module 'Orion.' It was a part of the our Lunar Module Systems Data Book which we would use in the event of an emergency and to trouble shoot system problems while on the lunar surface. It was exposed to the Lunar vacuum during three Lunar EVAs…this extraordinary checklist page from my personal lunar artifact collection bears silent witness to mankind's first journey to, and exploration of, the magnificent lunar highlands!" A highly detailed and aesthetically pleasing flown schematic relating to the ever important drive control of the lunar roving vehicle—an exceptional offering backed by provenance from the mission LMP.
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