I inheirited my Granddads reloading stuff. I have some old winchester primers with the wooden dividers that have a crushed velvet coatiing. They still ignite flawlessly.
VMMV, as I cannot venture a guess as to how yours were stored for the last 70 odd years.
When in doubt throw them out. Or load them for 'blasting' ammo. thats what I did.
Seriously, if they are cruddy looking, toss them.