Struggling with research with awards...

... so I've been updating 1970s arts show Aquarius. (https://www.imdb.com/title/tt0247852/reference/)

Over a hundred episodes missing, just 6 screenshots... I've put a lot of work into it. 

But there's one thing I can't find - the episode Hello Dali! (https://www.imdb.com/title/tt1086915/reference/) is said to have won an Emmy. There's even photos out there of Russell Harty holding an Emmy with the Aquarius team. Yet there's no listing of a win on the official Emmy site.

The director behind it talked of winning, and it even went into his obituary. I've looked at multiple avenues of research with no luck - can anyone help with a definitive answer at all, please?