Must have been mid to late 1970s.
It was when they still published the speakers' names on the light-blue circuit assembly programs.
I was a child sitting in the audience at Ashland Avenue's circuit assembly venue. I loved that place with it's own basement cafeteria and baptism pool with a big Jesus getting baptized mural behind it.
Samuel Herd was giving the talk. My child self could only remember my father pointing him out on the program. And he sounded like a baptist preacher. Interesting modulation in the talk. I don't remember much, except that Herdwas one fine black speaker man who was telling us about the Truth and Jehovah and living forever. I believed every word.
It doesn't surprise me he is GB now. I wonder if he remembers those day?