There are a wide variety of fabrics in this quilt, some much older than others, which makes it a challenge to date. It's one reason I brought it to be appraised when I went to the Antiques Road Show. The textile expert told me what I'd suspected--that it is circa 1920. Yes, there are some much older fabrics mixed in but scrap quilts are dated by the oldest fabrics and the ones in this quilt are 1910-1920. I suspect she may have traded fabrics with others (the papers I have indicate she did just that in the 1930s and 1940s) and my husband claims he can recognize some of his great-aunt Clara's apron fabrics and some of her husband's shirt fabrics in this quilt.
Not long ago I posted a photo of this quilt on Quilts--Vintage and Antique which has among their members appraisers and antique quilt dealers including many names I recognize and respect. The consensus was that circa 1920 was a good estimate.
A few years ago someone, seeing a photo of this quilt and intrigued by its construction, made her own version of it. That can be found here.