Exclusive pic#28 boy cycling in sailor suit

A boy about 11 yo cycling in a dark sailor suit. The collar is quite long. Long dark stockings Quite handsome. I can't say much more about it. It's a small real photo postcard. The boy is/was probably German. Date maybe 1920s but could be early 1930s or 1910s. The bike looks quite modern. There's is high wooden fence, maybe he was driving though a park. It doesn't look too rural with the high buildings in the background. I bought this from a seller in Munich but that doesn't mean anything. He also looks quite happy and was probably proud of his bike. Also note the shoes. They are not as dark, maybe brown. Not sure about the color of the suit and the stockings, maybe both even black.