Technical description: Blackwood with silver plated german silver ferrules and keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Graessel patent speaker key mechanism. Speaker key has with two tone-holes: the upper is activated by the thumb key and closed by the throat A|key; the lower is activated by depressing throat A key, standing closed if speaker key is used to overblow. Alternative R1 touchpiece for C♯₄/G♯₅. Disconnectable C sharp mechanism with a roller. 17 keys, 5 rings, one plate, 4 ebonite rollers.
L0: T; speaker.
L1: T + ring + vent; throat A♮; throat A♭.
L2: T + ring + vent; alternative cross key for F₄/C₆.
L3: T + ring; E♭₄/B♭₅.
L4: C♯₄/G♯₅; E₃/B♮₄; F♯₃/C♯₅; alternative lever for B♭₃/F₅; alternative lever for G♯₃/E♭₅.
R1: T + ring + vent; 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.
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.
With one case with (5151).
Also in case: two barrels for each instrument, sharing one unnamed ebonite mouthpiece, grooved for cord. Cleaner.
A pair with (5151).
h. fricke, oct-dec 2006.
purchased via eBay Germany.; Bequest of Sir Nicholas Shackleton, 2006.