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<p>[QUOTE=&quot;Mixdenny, post: 798614, member: 6981&quot;]Are you familiar with the Silent Watchmen system? Time clock stations were placed around a building and when the night watchman made his rounds he placed his key in each station as he came to it and turned it. There should be a raised number towards the end of the key and this imprinted the guard&#039;s number on a sheet of paper with time marked on it. The paper was driven by the clockworks. </p><p><br /></p><p>This kept the watchman honest and showed he had made his rounds and at what time. If the keys do not have a raised number on the shank then they are used to open the box itself and retrieve the marked papers I guess. They don&#039;t really look like the watchman&#039;s keys as I remember them. They looked more like an old skeleton key.</p><p><br /></p><p>I don&#039;t know when they started but this system was still in use in the 1990s and newer versions still are.</p><p><br /></p><p>Dennis[/QUOTE]</p><p><br /></p>

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