I contacted the seller. He doesn't know if it works or not and is not willing to test it. Found the auction house he bought it from a month ago. He only paid $1k for it. Told him good luck but doubt he will double his money for an untested, rough shape light...no matter how uncommon it is.
Here is the auction listing in case anyone wanted to see:
https://www.proxibid.com/aspr/RARE-...No-463821/34294237/LotDetail.asp?lid=34294237