caption: The image shows a poster of a man in a top hat playing a musical instrument, with the words "Bozner Messe 1921" written across the top. The man is wearing a long, dark coat and a hat, and is holding a drum in his hands. He has a determined expression on his face, and his eyes are focused on the instrument in front of him. The background of the poster is a deep blue, and the text is written in a bold, white font.