The image shows a drawing of a machine with a clock on it, which is believed to be a telegraph key.
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The image shows a drawing of a machine with a clock on it, which is believed to be a telegraph key. The machine is depicted in black and white, with intricate details that make it look like it is made of metal and has a handle on the side. The clock is connected to the machine by a series of gears and cogs, and the key is located at the top of the machine.