UNfound:

The Mauler Braille Typewriter (machine à écrire le braille; appareil à écrire et à lire a l'usage des aveugles) was invented by Auguste Mauler of Wangen, France, ca.1887. With the Mauler, a blind person could produce text legible by vision unimpaired individuals or visa versa.

Have some info about this typewriter? Have you found it? If yes, please email me at Antikey.Chop@gmail.com