Bass clarinet. Nominal pitch: B♭.

Technical description: Blackwood and german silver with chrome plated german silver ferrules and keywork. Four pieces: mouthpiece, crook, upper section, lower section and bell in one piece. Very ingenious compact design; crook bent in a circle and carrying the speaker keys and throat A and B♭ trill hole. Bell carries the three lowest tone-holes on the ascending tube. Automatic octave mechanism operating off R3; throat Akey operates the same switch for throat B♭. Extension to E♭₃. Standard B-C mark on the wood below E♭₃touchpiece. 18keys, 7covered tone-holes. L0: Plate F₄/C♮₆; speaker. L1: Plate F♯₄; throat A♮; throat A♭. L2: Plate E♭₄/B♭₅ correspondence. L3: Plate; cross E♭₄/B♭₅. L4: C♯₄/G♯₅; F₃/C♮₅; E₃/B♮₄; F♯₃/C♯₅. R1: Plate B♭₃/F♮₅ via correspondence; side E♭₄/B♭₅; side F♯₄/C♯₆; trills 1-2. R2: Plate B♮₃/F♯₅ via correspondence. R3: Plate B♮₃/F♯₅ via correspondence; cross B♮₃/F♯₅. R4: G♯₃/E♭₅; E₃/B♮₄; F₃/C♮₅; F♯₃/C♯₅; E♭₃. Keymount type: screwed in pillars. Keyhead type: modern. Repair History: The mouthpiece is a replacement.