Sorry Katharine but what you describe are Shop coats.
My Dad wore them when he served in our shop.
He wore the beige/fawn ones.
Shops selling food like groceries ,bread etc wore white ones as did Dentists .They were buttoned up the front .Made from cotton twill.
Those in the photographs are very different.Made from unbleached linen
they were very full and that fullness was taken in at the yoke by smocking hence the name smock.
They had large collars and full sleeves.
Each county had its own smocking patterns,a way of sewing which securely
caught and gathered the fullness.
Smocks like those in the photographs were not worn much after about 1920’s I should think.
You see them in museums dedicated to Rural Life.
Perhaps the description of country folk” Yokels” comes from those smocks,
Viktoria