Looks like the blocks were made to be used but never finished into a quilt. Would like to know the story behind them, wouldn't you? If there is a quilt museum in your area I would suggest you make an appointment with a curator, show them the blocks and ask for their opinion. If there isn't, contact the Quilt Museum in Paducah KY, send pictures and a description. They have quilts made many years ago and know how to preserve and show them. Personally I don't think they are as fragile as some think. There is a book available that shows printed fabric from years ago, each one in your blocks can be identified as to the year it was sold.
Carol J.