This ad for Selmer saxophones, courtesy of Linda Fitak, comes from Rhythm magazine (March, 1931). It pictures Jack Hylton's alto sax trio (Andre Ekyan, E. O. Pogson & Chappie D'Amato) and mentions other big bands' sax sections using Selmer only, among them Paul Whiteman's (Frankie Trumbauer, Chester Hazlett & Charles Strickfadden).
