St Clair River Tunnel Postcard
ca. 1907, prior to electrification of the tunnel. At that time, trains were pulled through the tunnel by camelback 0-10-0 steam locomotives that were bi-directional. In this postcard, one of the 0-10-0 locos emerges from the Pot Huron end of the tunnel.
Scan of Public Domain Postcard
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BH Photo #120664