At Sanwa, sometimes briskets are marked select, sometimes choice.
But most of the time there is no grade on the cryo.
I bought a packer labeled as select on friday, and although I've had better cuts, this one cooked very well at the tailgate.
IBP and EXCEL are typically found there. Some have no labels at all except for the inspection labels.
Once they had briskets from Mexico.
I cook them all high heat though. I really believe that helps.