This picture was taken at the Jazz Gala of 1976 in Wiesbaden, and shows:

Back row, James Towsey, Ferdinand Povel, Herb Geller, Wilton Gaynair, Johnny Griffin, saxes;
Ack van Rooyen, Ron Simmonds, Rick Kiefer, Derek Watkins, Art Farmer, trumpets;
Otto Bredl, Jiggs Whigham, Slide Hampton and a local musician sitting in for Albert Mangelsdorff;
Peter Herbolzheimer, announcing (bass trombone)
Wolfgang Dauner, piano; Volker Kriegel, guitar; Niels-Henning Ørsted Pederson, bass; Alex Riel (and Grady Tate), drums; Nippy Noya, percussion.