We have not yet developed information on regional or demographic differences. We do not yey know if they were more common in city or rural schools or if there were regions in France that they were very common. We see school photographs of children in both city and rural villages both wearing and not wearing smocks. Individual schools also bary. At some all or most of the children wear smocks and at others few or none of the children wear smocks. Thus we do not yet understand the regional or demographic patterns. There are quite a few images of schools in the 1920s archived on HBC. We need to link them here to show 1920s trends, one of the many projects on our list of projects. An example of Paris boys wearing school smocks is a photograph of two boys warching what looks like a group of American Boy Scouts in a Paris park, we believe in 1920. The boys are presumably on their way to or from school.