Technical description: Boxwood with german silver ferrules and keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Black plastic mouthpiece with a silver lay not named but appears to be an authentic Munich one, contemporary with the instruments. Additional L3 F₄/C₆. Alternative R1 touchpiece for C♯₄/G♯₅. Sockets are lined with german silver. End pivoted F₃/C₅. Additional RH thumb lever for F♯₃/C♯₅. Forked B♭₃/F♮₅ vent just under G♯₃/E♭₅ key. Were 18 keys, now 17, 4 rings, 4 black rollers.
L0: T; speaker.
L1: T + ring + vent; throat A♮; throat A♭.
L2: T + ring + vent; alternative cross key for F₄/C₆.
L3: T; E♭₄/B♭₅, alternative side F₄/C₆.
L4: C♯₄/G♯₅; E₃/B♮₄; F♯₃/C♯₅; alternative lever for G♯₃/E♭₅.
R1: T; side F₄/C₆; side E♭₄/B♭₅; side trill key for throat G-A or C₆-D₆; side trill for throat A-B♮ and B♭-C; alternative touchpiece for C♯₄/G♯₅.
R2: T + ring + vent.
R3: T + ring (forked B♭₃/F♮₅); cross B♭₃/F♮₅.
R4: G♯₃/E♭₅; F₃/C₅.
Keymount type: screwed in pillars with push-pins.
Keyhead type: modern.
Playing accessories: reed, cord, wooden reed-cap. (5185) and (5186) are cased in a brown leather case lined with red velvet. Also in case: non-original cork grease.
Repair History: The G♯₃/E♭₅ lever for L4 had been removed. Glued crack in bell.
(5185) in B♭ and (5186) in A are a matched pair of clarinets.