This is an African blackwood instrument with (probably) silver keys. The sockets are probably lined with german silver. The conservatoire mechanism (see below) is only partly employed (R1). The instrument is stamped on all 3 sections “MARIGAUX / A / PARIS”. The bell is additionally stamped “PARIS / S.M.L.” The fitted case, in artificial leather, is by Lorée. The usable pitch is A4 = 440 Hz.
The instrument is excellent in performance, with even response and intonation, although the tone quality is somewhat thinner than would be expected form a present day equivalent
Technical description: African blackwood with probably silver keys. Sockets are lined probably with german silver. Semi-automatic octave keys. The conservatoire mechanism is on R1 only (despite the L2 spat). There is an extra bell vent for low|B♭. The R2 plate is independent of the R3 ring although both close the brille and both are on the same axle. Depressing the low|C key lowers the R2 plate and R3 ring and closes the brille. There is a linkage enabling low B to be played with R4 on the low C or C♯ key.
L0: 8.1; 8.3. L1: PP; 8.2; spat. L2: R; Dtr-alt; spat. L3: R; D♭tr. L4: G♯; low B; low B♭; E♭-alt. R0: sup. R1: R; G♯tr; B♭tr. R2: PP; Dtr. R3: R; F; BAN-low C. R4: low C; C♯; E♭.closed standing forked F vent. Keymount type: pillars. Keyhead type: cup.