The below image and caption were just added to the Trombone History Timeline (20th century).

1909—Seattle, Washington: A postcard features a clown band at Luna Park, an amusement park in Seattle from 1907 to 1913. The postcard is labeled “LA. SOUSA CLOWN BAND/SEATTLE, WASH/SEASON—1909” (see below image; public domain) (Seattle Municipal Archives).