The presenter was the late Katharine "Sainty" Crossley, a great granddaughter of Charles Kirkham Jenner. Sainty's grandmother was Helen Milby Jenner Legg, daughter of Charles K. Jenner. The quilter was Helen's mother, Cornelia Comstock Jenner.
According to Sainty, her segment was filmed 2-3 times due to technical and esthetic reasons. (Feigning surprise at the end was especially difficult on repeat takes!) On reshowing of the segment in Antiques Roadshow anthologies, we have seen slightly different content than that presented here.