I put together an antique quilt top simular to yours. Not all the blocks were quite the same size, I made adjustments without hurting the integrity, These were probably from the 30's all the ladies have passed on, some I knew. I used sashing that had tiny roses in mauve, Since there weren't enough blocks for a whole quilt I filled in with same size blocks of muslim that I had hand embroidered a large rose. My MIL name was missing and the block should have beeen easy to do, it took me 3 hrs. to get that dag gum block done. I FMQ the whoe thing except the center of the roses. If it falls apart in the wash someday so be it. I vowed to finish what my MIL never did. It is beautiful. You have to measure the value of your heirloom. Obviously someone intended for the squares to be put into a quilt.