This was the first model of the Zerograph telegraph typewriter. It's successor was designed less weighty and with a curved keyboard similar to that of a Hammond. Several of the 2nd model have been found but, obviously, none of the 1st. The Zerograph was invented ca.1895 by Leonard "Leo" Ulrich Kamm of London. The typewriter would have been produced by the Kamm's Zerograph Syndicate Ltd., also of London. Though the Zerograph was a commercial failure, it wasn't Leo Kamm's only invention. In fact he had several including the Kammatograph, which has been his greatest mechanical legacy.

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Read more about the Zerograph here...

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