If you cut off the border I would think you'd have a hard time finding fabric from that period in such long pieces. Without more of a close-up they look like feed sacks to me. But the rest of the quilt looks newer.
Maybe the blocks were done at one time and then put together years later?
I know Connecting Threads has a line called Canning Day that features feed sack looking fabrics.
Let us know what you do!!
It's so pretty!!!!!!! :D