Technically the Sampson Permagraph isn't a typewriter, it's actually an overproduced check protector. Its standard keyboard can punch (not type) a message through paper. Note that the Permagraph has a motor so it's electric, and, as a result, very heavy. Made ca.1930. Please email me if you have one.
Have one for sale? Please email me at Antikey.Chop@gmail.com