A non-keystone variant directional marker at City Avenue and Old Lancaster Road in Lower Merion Township. Apparently this was a separate sign system created by Montgomery County for use along Old Lancaster Road.  Although not keystone-shaped, it uses the same basic shape as a typical keystone marker, the same lettering used on keystone-shaped directional markers , and is mounted in the same fashion as the keystone markers.  The original post for this one is gone, and it has been mounted on a round replacement pole.