Technical description: Black varnished boxwood with ivory ferrules and brass keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. Waisted barrel for a long-tenon mouthpiece. 4 cross keys in blocks, 3 side keys and one L4 lever in saddles. Additional cross B♮₃/F♯₅. Levers for L4, tone-hole and key for R4 mounted in rudiment of a bell-shaped swelling. Bevelled G♯₃/E♭₅. All tone-holes under keys lined with brass. Shaped german silver thumb rest. 13 keys, 2 brass rollers on L4 levers.
L0: T; speaker.
L1: T; throat A♮.
L2: T; throat A♭.
L3: T; E♭₄/B♭₅.
L4: C♯₄/G♯₅; E₃/B♮₄; F♯₃/C♯₅.
R1: T; side F₄/C₆; side trill key for throat A-B♮ and B♭-C.
R2: T; cross B♮₃/F♯₅.
R3: T; cross B♭₃/F♮₅; side B♮₃/F♯₅.
R4: T; G♯₃/E♭₅.
Keyhead type: shallow cups.
Keymount type: blocks, saddles.
Inscribed on bell " KEY & CO / 20 CHARING CROSS / LONDON" / unicorn head.
Repair History: Ivory rings inelegantly turned down, bell rim removed.