Kustom Audio made these in the 70's. They were famous for their "tuck n roll" guitar and bass amps and mixers. I'm sure you've seen those. Metallic Blue sparkle vinyl rolled amps with usually 2 port holes. Those were sooo cool to have back then!
They also had a "Kasino" line listed as the "little sister" level of PA amps systems and mixers to the Kustom stuff.
Here's a link:
That one you have looks pretty interesting. Does it work? Might be something worth refurbishing. It would have a pretty analog vintage sound to it no doubt. Does it have balanced XLR inputs on the top there or 1/4" jacks? Take a look inside that thing!
Maybe you could take some more pictures of the plug in top area and front panel to see better what is what...
One meter for a PA is all you need!....is it VU or DB meter?
BTW I think that's a 16 channel mixer!?!