Made from polished maple, the instrument has brass ferrules, bell rim, keywork and crooks. It has two crooks, the shorter with one hole, the longer without holes. There is an extra wing for lower pitch and an ingenious linkage to the low D key to facilitate low C sharp and low B natural. Either of the two harmonic keys on the shorter wing operates the crook key. The ornamental D flap guard is an attractive decorative feature. The alternative wing sections for low and high pitch, give an instrument with 12 or 13 keys respectively. The usable pitch with wing 1 is ‘modern pitch’ A4 = c 440 Hz, with wing 2 ‘low pitch’ c 435 Hz. The instrument sounds best at the latter pitch with the longer joint and crook.
The instrument is stamped on the butt with a sunburst and “Savary / jeune / A PARIS” / sunburst; and on reverse “1840”. The shorter wing is stamped “1”, the longer “2”.
Technical description: Maple with brass ferrules, bell rim, keywork and crooks. With two crooks: one with hole (shorter) and one without hole (longer). Extra wing for lower pitch. Ingenious linkage to low D key to facilitate low C♯ and low B♮. Either of the two harmonic keys (on the shorter wing) operates the crook key. L0: C plate; B♭; B♮; harm 1; harm 2; E♭; D; C♯. L1: T. L2: T. L3: T. L4: C♯ (on shorter wing only), R0: T; F♯. R1: T. R2: T. R3: T; B♭. R4: F; A♭.