Both in very good condition, I can't find a brand on either item.
The frame I think is an old premier, before they began using old orange crates for wood.
Looks like maple and has through tenon joints with the typical split back with pivoting spring fasteners.
The plate holder is also in good shape but there is a dent in one of the slides. I doesn't seem to be leaking light but has not been film tested.
Take the pair for $40.00 shipped, no fees to you.