I bought this from a lady In San Antonio who used to travel around the US with her mother. Her mother was a dancer, or so she says, and picked stuff up from wherever they went. I bought four chips from her that day and paid a very small fee for the lot. I ended up selling it to someone quite a few years back for $555 (if I remember correctly).

D & N Bar
744 B St.
Sparks, Nevada 89436
Open: 1944 Close: 1962
I think only 500 of these were made and only a few remain.