I don’t remember having the band send off at the RTO. Perhaps that’s because in 1969 we were sending people back to the States on Pan Am 707’s from Tegel. (I’ve got a short tale from that operation, too.) In 1971 we were sending people back to the States on Pan Am 727’s from Tempelhof to Frankfurt and then Pan Am 747’s to JFK.
Allen Lawless might know more about this. If they did play something specific it was probably Auf wiedersehen.
As with many of us on those flights I had mixed feelings as we took off.
-- rwr