Technical description: Boxwood with horn ferrules and brass keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Very individual keywork. Throat A key crossing throat A?. Additional R0 thumb lever for G?3/E?5. Alternative touchpiece for R0 to F?3/C?5 lever. 15 keys. L0: T; speaker. L1: T; throat A?; throat A?. L2: T. L3: T; E?4/B?5. L4: C?4/G?5; E3/B?4; F?3/C?5. R0: additional G?3/E?5; alternative touchpiece F?3/C?5. R1: T; side F4/C6; side trill key for throat A-B? and B?-C. R2: T. R3: T; B?3/F?5; side B?3/F?5. R4: F3/C5; G?3/E?5. Keymount type: rudiments of turned wooden rings, blocks. Keyhead type: flat round.