In the first photo, below, they are worn by Jill Twiddy (left),
and Shelley Hack on the right.
From the pages of Simplicity Fashion News, circa 1971:
It is shown in the maxi-length version very similar to what Ms. Hack is wearing.
Only the pink belt is different:
At one dollar per pattern back in those days, you could really get your money's worth, right?
Of course, that's assuming your fabric wasn't too expensive.
The back of the pattern: