The Harlem Gentlemen was the trumpet player Buck Claytons band that he brought to Shanghai in 1934 to play at the Canidrome Ballroom. See Buck Clayton and the Canidrome for details.
Image of Buck Clayton and his band, The Harlem Gentlemen, thanks to:
Wilbur "Buck" Clayton Collection, Department of Special Collections, Miller Nichols Library, University of Missouri - Kansas City (By permission) and the Institute of Jazz Studies at Rutgers University. Thank you both!