The Diplogtraphe braillewriter (braille typewriter, machine à écrire le braille, appareil à écrire et à lire a l'usage des aveugles) was invented ca.1877 by Ernest Recordon of Geneva, Italy. This index typewriter was unique because it was capable of typing both braille and text at the same time. The Diplographe's two concentric typewheels executed this task on separate sheets.
Have one for sale? Please email me at Antikey.Chop@gmail.com