I don't know definitively, but that looks modern to me. Those recessed chrome handles and latches don't look old at all to me. If that is felt inside, then I would say it is less than 20yrs old. At my work we move electronics around all the time, and our current boxes are blow molded Hardigg cases. Previously we had a local company custom build sets of boxes to a set of agreed drawings. That company used black hard but somewhat cushiony foam linings. It isn't a hard stretch to think they would have used thick felt if they could have gotten away with it.