I'm having problems getting a good clear picture. In the meantime, here are the button markings left to right; AUS, PHONO, LANG, MITTEL, KURZ, O-UK, O-M, UKW. Maybe the "O" designation is for tape recorders? There's an little picture of a tape deck on the back panel.
(BTW, the tubes are 2x 12AX7, 2x 6BQ5, 2x 6BA4, ECH81, EABC80, EB91, and EF84. Too bad most of the Seimens tubes were weak!)