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Published on Sep 14, 2012
A brief trasmission using an old Mecograph "Right angle" semiautomatic key. It was made after first W. O. Coffe patent of 1904. That patent was the first mechanical-only semiautomatic key. The Coffe's mechanism involved the release of spring tension to create a vibration and the horizontal right angle versions were built by Bellows at Mecograph Co. until his death in 1913. Thanks to Ron G3YUH for some missing parts rebuild.