Alexis Tower on the north side of Toledo, Ohio.  This tower protected the crossing of both NYC main lines to Detroit as well as the Ann Arbor Railroad and the C&O.  In its heyday, the tower also saw trains of the Pennsylvania Railroad.  Photo by Charlie Whipp in April 22, 1983.

The interlocking plant in Alexis was a combination of "strongarm" type, as well as two additional electric interlocking machines (green units).  These may have controlled nearby interlockings such as "K", just south of Alexis.  Photo on February 11, 1989 by Charlie Whipp.