Looks like it’s on a 9’ box.
Only keno boards I’ve ever saw were all on 9’ box’s. I’ve see lots of them over the years.
They are VERY hard to get, they are “gambling paraphernalia“
In most areas and are illegal. Stupidest thing ever. So I have 2 of them. One was a gift from a fellow AZB member. He built it for me-wow is it nice.
Best
Fatboy