One brand that I think epitomizes the 70's is Gucci, especially a classic loafer like these, I also love this sandal, there is something about a brown suede shoe that is so 70's to me.
these or a denim skirt like this one
This fringe Saint Laurent Bag has 70's written all over it, as well as this bag
one and anything DVF like this romper is a quintessential part of 70's style
I love the 70's sophistication of this print dress from Ulla Johnson and a caftan like this one from Cool Change is just so Mrs. Roper chic
And last but not least the clog, and Michael Kors always does a great clog and so does Isabel Marant