What's not to love about a typewriter that is so exposed. It's very satisfying watching the springs and levers react while typing. The Keystone was the invention of William Prehn Quentell who, several years later, also invented the Postal typewriter. He didn't stray too far from the Keystone's footprint because if you were to place a Postal next to it you would definitely see the similarities. The Keystone was produced by the Keystone Typewriter Company of Harrisburg, Pennsylvania.
Have one for sale? Please email me at Antikey.Chop@gmail.com