I used to work in a fabric shop during the 80's and those fabrics look more 70's to me. The colors particularly from that era. So 60's fabrics could be there too because, well you know how we work. We by fabric and then keep it until just the right moment hits us. It might be interesting to see when you take it apart if there are any little snippets of salvage edges that may give you a clue to the age of fabric if not the age of the quilt.