Thanks for an informative post on the proper care and storage of the quilt. The blocks have many different types of fabric in them.
When I said unfinished I mean there are 7 additional plain crazy quilt blocks (about 18" squares) without any embroidery on them that haven't been sewn to the main quilt. The edges of the quilt are raw...no binding.
As far as backing, the crazy pieces were hand sewn onto a square of fabric (some appear to be cheese cloth or linen).