The Hall Stereotype Maker was invented ca.1893 by Frank Haven Hall of Jacksonville, Illinois while he was Superintendent of the Illinois Institution of the Blind. It was used to impress braille characters into plates of copper. Not really a typewriter or braillewriter by definition, but I like it.
Have some info about this typewriter? Have you found it? If yes, please email me at Antikey.Chop@gmail.com