Conserved garments are sometimes significant, not for the particulars of their loveliness but because they exemplify a period so completely. This day dress is a perfect candidate in that regard. This American made, and very likely home sewn dress, gives us a clear, clean picture of the shape, popular decoration, and position in society that fashion was decreeing for women of the time.
Where we get to see the evidence of home sewing craft is in the details of the decorative work.
My final point here is about societal position. This dress is a poster child example of what was expected. It shows us exactly the level of rectitude and reserve that was considered correct for women of the day. This is a garment for a person who conforms, and knows their role in the home, the family, and the larger community, which is precisely what was intended.