They are of course the marble countertop looking ones (built until 2019 I think?), but can anybody date the box? I bought them used a few weeks ago. Seller said something about 2017-ish but given the box says "for digital" I have a suspicion they might be quite a bit older. anybody know?

They sound good and are in good shape, so at this point, older would be a plus I suppose. what say you?