Yes. Terry, my 54 was tentative: 55 more likely. 55 not early 50s - but not late 50s either: couldn't be more mid-, indeed! But my point with Will's list above was that this thread is not about pop, but folk - specified in title of thread. & I aver that it was Burl Ives, more than any other, who started the worldwide guitar-the-instrument-for-folk idea, following a well-estd tradition in USA (Broonzy, Guthrie, White, the Blues) even if not here, that started the association worldwide, incl here — where we had indeed already had Elton Hayes but perhaps not many more. Ives' first success - Wayfaring Stranger, 1944. Well estd worldwide, guitar as instrument to be used for such singing, by 48 at latest, surely? So that the 'wandering minstrel' of my mother's restaurant was what by then - 1951 - you EXPECTED to find in that sort of posh but informal milieu.