TRANSPOSITOR
(removable pianoforte
keyboard for transposition)
72-keyed (keyboard extent is Е of
the contra octave — е of the four-line
octave)
Pleyel, Wolff and Company Factory, No. 1040.
France, Paris, 1880–90e
“PLEYEL WOLFF & Cie EN FRANCE & À L’ÉTRANGER BREVETS” — a stamp by black dye on a round bone label embedded in the front side bar;
“1040” — embossed with a punch on the back side of the front side bar.
1240×180×100
Wood, metal, bone, cloth
Around 1902, arrived from an unknown source
Stock number: 1467/1
Laid on a traditional pianoforte keyboard.