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Found in Shem Drowne's grave as a quest reward for completing The Gilded Grasshopper. Beyond its listed 10-cap value and its scrap potential as bone, its sole use is as a unique souvenir: It looks like any other skull, and behaves the same when manipulated (i.e., the jaw dangles while it's unsupported). Because it is tagged as junk rather than as a quest item, it can -- and likely will, if placed in workshop inventory with other junk -- be scrapped (or converted for oil) inadvertently; take care if you wish to save it.
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