[ErikV]

Ty,

I watched that game last year with my MLB.tv subscription. So, that is
definitely not the correct answer.

Frank,

If I understand your question correctly you mean NO broadcast whatsoever?
Or, shown only regionally? I remember wanting to watch Nolan Ryan's
seventh no-hitter in 1991, but living in SoCal and there not being MLB.tv
I was stuck only watching the highlights on the evening news.

If I had to guess, I'd say probably in the 1970's or 80's sometime.

ErikV