I don't know what the original picture was since ti was deleted but if it was similar to this it was real. Had to ask my grandmother, born in 32, about it. It was called the "Bellamy salute".
The Bellamy salute was a palm-out salute described by Francis Bellamy, the author of the American Pledge of Allegiance, as the gesture which was to accompany the pledge. During the period when it was used with the Pledge of Allegiance, it was sometimes known as the "flag salute". Both the Pledge and its salute originated in 1892. Later, during the 1920s and 1930s, Italian fascists and Nazi Germans adopted a salute which was very similar, and which was derived from the Roman salute, a gesture that was popularly (albeit erroneously) believed to have been used in ancient Rome. This resulted in controversy over the use of the Bellamy salute in the United States. It was officially replaced by the hand-over-heart salute when Congress amended the Flag Code on December 22, 1942.