You have a wonderful find there that's made even more special by the story behind it.
The quilt on my bed right now is a hexagon pattern (Grandmother's Flower Patch pattern?) from around the 1930s made with what I'm pretty sure is fabric from flour sacks. It's pretty worn out but is our favorite quilt. One of our local grocery stores was selling flour in cloth bags up until about 5 years ago. I wasn't interested in sewing at the time but I was still tempted to buy it just for the fabric. It's been a while since I've seen any more in there though.
The lady that made this quilt must have been a very patient person. The hexes are about 2 inches across and every single one of them are hand stitched with every hex quilted around the insides of their borders too.
I think there's a forum rule somewhere that says you need to show us some of the tops too.
Rodney