Travis,

I have this chip and have it listed Unknown. The person I got it from traded as Nevada Hotel BM. I can not find any thing in the CR under either BM or Ely that leads me to believe it is from there. Battle Mtn Bar could be Ely or NH BM.

Arrowdies were issued until about 1965, so both would be candidates. I have doubts it is either one. Why would it be the ONLY arrowdie at a casino?