This 16-keyed reed Contrebasse à anche is shaped like a slender tuba and pitched in E flat. It has a brass body, keywork and crook. The body is folded in 5 sections. There is a water-key on the wide-tipped crook. The holes are almost as wide as the bore so that only one at a time need be opened and no further venting is required.
The instrument is inscribed on the bell “Manufactured by / J. Albert / Brussels / S.A. Chappell / Sole Agent / 52 New Bond Street, 52 London”.
Technical description: Brass body, keywork and crook; body folded in five sections; wide crook tip; holes are almost as wide as the bore so that only one at a time need be opened, since no further venting is required; with water-key on crook and music card-holder fitting.
L0: D; E♮; F; speaker. L1: C; B♮ (or for L2). L2: B♭ (or for L3). L3: A (or for L4), L4: G♯. R0: F♯; G. R1: C♯; D (or for R2). R2: D♯ (or for R3). R3: E (or for R4). R4: F♮.
General usage of type: The standard model adopted by Mahillon, Besson etc was based on C*verveny*/'s `Tritonikon' of 1856.