The only way you will be able to see if it is the premium value stuff, versus the run of the mill value stuff, will be to decode the headstamp on one of the rounds itself. The crate markings don’t mean anything hardly. I’ve bought ungodly amounts of that stuff over the years as my dad did before me. We had multiple times where identical “crates” had entirely different ammo on the inside. You might get lucky and someone will just buy it as a gamble, but the top tier value “probably” won’t come unless you can tell the buyer exactly what the headstamp is and have a picture of the round. It’s otherwise impossible to know if steel core, standard steel core, or lead core. They also had non corrosive ammo during the same era as well, but without a headstamp and pic of a cartridge, there’s zero way to know.