Technical description: Blackwood with silver plated german silver ferrules and keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Additional L4 lever for G♯₃/E♭₅. C sharp mechanism. 15 keys, 5 rings, 4 black rollers.
L0: T; speaker corresponding with first ring.
L1: T + ring + vent; throat A♮; throat A♭.
L2: T + ring + vent.
L3: T + ring; E♭₄/B♭₅.
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 + vent + ring.
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.
Keyhead type: modern.
(5121) and (5495) in original brown case lined with purple velvet.
Label inside lid “F. Arthur Uebel / Markneukirchen i. Sa. / Werkstätte für erstklassige Holzblasinstrumente".
Also in case: 4 plastic cork protectors, one extra barrel for each instrument. One black plastic mouthpiece, grooved for cord for each instrument. One extra cocus wood mouthpiece, grooved for cord in an aluminium box for each instrument. Screw driver, two mops.
(5121) in D and (5495) in E♭ may be a matched pair of clarinets.