Technical description: Probably african blackwood with probably german silver keys. Central socket and reed well lined with german silver, but bell socket has just a ferrule. Simple octave keys. 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.
L1: PP; 8.2.
L3: T; Dtr.
L4: G♯; low B; E♭-alt.
R1: T; B♭; C.
R3: R; F.
R4: low C; C♯; E♭.
Stamped on upper section and bell only with "EXCELSIOR / CLASS / HAWKES & SON / DENMAN STREET / PICCADILLY CIRCUS / LONDON".
Usuable pitch: Old Philharmonic pitch A4 = 453 Hz
Performance characteristics: using a smaller reed than would be used for a modern oboe, the instrument makes a strong, dark and solid sound with good attack and excellent intonation.
With fitted case covered in artificial leather.