Technical description: Blackwood with ivory ferrules and silver keywork. Five pieces: mouthpiece, barrel, upper section, lower section, bell. The mouthpiece is of pewter with a brass slide through the barrel. Barrel and joints between sections lined with brass. Upper section has a narrow brass tenon. Speaker liner at the front of the instrument, chimney. Sockets and pillars for throat A and A?, side F4/C6, side and cross E*Flat4/B?5, cross C?4/G?5. , L0: T; speaker. L1: T; throat A?; throat A?. L2: T. Duplicate lever for L3: E?4/B?5; side F4/C6. Thumb hole lined with brass. Lower section: spectacles mounted on pillars, saddle for hinge-key; clumsy wooden thumb rest. L3: T; side and cross E?4/B?5; duplicate side F4/C6. L4: C?4/G?5; E3/B?4; F?3/C?5. R1: T; side F4/C6; side E?4/B?5; side trill key for throat A-B?. R2: T + spectacle, R3: T + spectacle (forked B?3/F?5); B?3/F?5. R4: hinged F3/C5; G?3/E?5. Keymount type: original keys, blocks; additions, metal saddles and screwed-in pillars. Keyhead type: original keys, flat round; additions, saltspoon. Repair History: May have started as a 12 key clarinet; the A, A?, B? and G? keys have been modified or repaired at one stage, and at a still later date the second C keys and alternative touchpieces B? and spectacle have been added. The F, spectacle and G? key-holes have cut seating, so these are probably not original. The B tone-hole has been very neatly plugged, but the hole is clear on the inside. Wooden thumb rest probably added.