Though the Double Link quilt design is one of the earliest quilt patterns, Nancy describes it as "almost modernistic in pattern." I'm surprised she doesn't mention it as being the Star of David.
I believe this was an applique pattern. I could not find find a copy of Nancy Cabot's Double Link quilt pattern but I found one attributed to the Progressive Farmer here. I haven't been able to find any quilts made using this pattern or any additional information about it.