Bass clarinet. Nominal pitch: B♭.

Technical description: Cocus wood with german silver ferrules, keywork, crook, and bell. Five pieces: mouthpiece, crook, upper section, lower section, and upright bell. Crook with a brass coloured tenon. Some pillars also brass coloured. Two speaker keys, one of them with a chimney mounted on crook. Additional R0lever for F♯₃/C♯₅. All tone-holes covered. Lowest tone-hole in bell. 15keys and 2red rollers, 2rings. L0: Plate; speaker 1-2. L1: Plate; throat A♮; throat A♭. L2: Plate. L3: Plate; cross E♭₄/B♭₅. L4: C♯₄/G♯₅; E₃/B♮₄; F♯₃/C♯₅. R0: F♯₃/C♯₅. R1: Plate; side F₄/C₆; side E♭₄/B♭₅; side trill key for throat A-B♮ and B♭-C. R2: Plate + spectacle. R3: Plate + spectacle (forked B♭₃/F♮₅); cross B♭₃/F♮₅. R4: G♯₃/E♭₅; F₃/C₅. Keymount type: screwed in pillars. Keyhead type: modern. Repair History: Seems to have been coloured and then again de-coloured. Some soldering on the bell. The mouthpiece is a replacement.