To put it into more perspective slim ,we here in Australia never heard Fred Fraz give any talks that I can remember and I was JW from 1960 onwards .
Talks were always given mainly by Australian brothers from Bethel when it was a District assembly or an International convention .I remember L .Barry ,Henschell ,,I don`t think I ever heard Knorr ever give a talk either.
They were purely for the American audiences or maybe even Europe ,probably Australia didn`t count for much in those days..
Thats the way I remember it anyway .