doesn't that make sharing pre-1960 recordings legal?

Not sure, but Won't You Go My Way? wasn't recorded till 1971. Argo is supposed to be digitising their back catalogue but I don't see any mention of that one. It was a live recording done in Norwich and the notes to Wake The Vaulted Echo gives full recording details. No idea if the original masters ended up in a Paris skip but if so, surely Argo could ask the named engineers if they have the tapes.