The real photo postcard above has no identifying information. I bought it because it is a classic example of a portrait of stair step children. The term stair step children sometimes refers to children of a family who are spaced closely in age. Its meaning is more obvious when the children are spaced fairly evenly, but farther apart. When the children are lined up standing from youngest to oldest, or shortest to tallest, they resemble stair steps
Below is a family portrait I found on the Internet. It was posted on a Polish blog here, along with some other old pictures of children. There are seven steps here--five children and two parents.
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