My mother made a quilt quite similar to that in the late 50s or early 60s. I distinctly remember it on their bed by the mid 60s. Hers was cross stitched in blue and green. Her kit may have come from Herrschner's -- but it also may have come from either Lee Wards or one of the local department stores.
You did a lovely job of rescuing these blocks and making a beautiful quilt. Your hand-quilting sets them off to perfection.