The shirtwaist dress, one that buttons in the front from the collar to the waist seam and sometimes beyond, is a popular American style that keeps going in and out of fashion. One period where it definitely wasn’t on the “what to wear list” was the 1960s, when sheath dresses ruled the fashion scene.
This older woman didn’t seem to care, though. She continued to wear this comfortable style. Where did she find it? The Sears catalog was still offering shirtwaist styles in the early 1960s, so maybe she was wearing an earlier purchase. Or maybe she made it herself.