Ak-Sar-Ben is "Nebraska" backwards, and judging from the insignia on the door it probably served at the Ak-sar-Ben indoor horse race complex in Nebraska at some point.
this one would appear to be a national. interesting asking price but I see it's a haggle site. good stuff on the out side but no mention of what is left inside. national may be easer to find them my stoner is on that.