The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Children. School. Classroom. Teacher. Unknown Place
Unknown Place. Children. Classroom. Teacher. School. G. S. Gentry
School Children in the Class Room. Real Photo
School Children in The Class Room. Agfa
At school. Children and teacher in the classroom
Class Room. School Children. Probably Brighton. Postcard
Group of Children. School. Teacher. RP. Postcard