The Wetherill "Typen" Typewriter was invented ca.1924 by Dr. Henry Emerson Wetherill of Phoenixville, Pennsylvania. There was at least one usable prototype produced and I am also aware of a reproduction that's been circulating between collections.
Have some info about this typewriter? Have you found it? If yes, please email me at Antikey.Chop@gmail.com
Read more about the Typen Typewriter here...