I quilted it last night and found out more about the fabrics. It may be made of fabric samples or the end of bolts. There are markings on some of the pieces and the fabrics are varied- not all cotton.They seem to be from clothing fabric of the time, all quite dirty/dusty on close inspection. Probably not all from the same decade. Here are some pictures taken last night. I'm binding it now, red cotton, all machine binding, quite wide to cover the uneven sides.