Die Bortess Kollektion
Piano-Modelle
Bortess 42 IV
Bortess 38 IV
Bortess 42 V
Bortess 38 V
Bortess 42 V Double Basson
Bortess 38 V Double Basson
Bortess 42 V Double Basson Musette
Bortess 38 V Double Basson Musette
Bortess Bayan Piano 42 IV
Bortess Bayan Piano 42 V
Bortess Bayan Piano 42 V Double Basson
Bortess Bayan Piano 45 IV
Bortess Bayan Piano 45 V
Bortess Bayan Piano 45 V Double Basson
Chromatic-Modelle (b-system/c-system)
Bortess Bayan Chromatic 58 IV
Bortess Bayan Chromatic 64 IV