When 1956 rolled around on the calendar, Indiana decided to make some changes. One was a required change, as all North American license plates were required to go to a 12"x6" size this year.
The half-inch crop from the height of the plate meant that the dies, while having the same basic appearance as those used from 1950-55, had to be made ever so slightly smaller.
Atop the plate, debossed in a yellow strip, is the admonishment to "Drive Safely."
Finally, from this point on, Indiana went back to single plates. From time to time, a bill is introduced in the Indiana General Assembly to require two plates (front and rear), but none of the bills introduced in my lifetime have ever gained enough traction to make it into law.
This plate was issued in Spencer County.