Apollo 17 "Locator" to the Rover, probably from the Station 6 overhang sample.
NASA
2012-03-02
<a rel="nofollow" class="external free" href="http://www.hq.nasa.gov/alsj/a17/AS17-140-21409HR.jpg">http://www.hq.nasa.gov/alsj/a17/AS17-140-21409HR.jpg</a>