9-2-2009: Mopeds
Here's an interesting sight I happened across today: Two moped plates in completely different "A-C" series.
Since the current series began in 1992, Moped plate numbering has progressed through the 12 34, A1 23, 12 3A, and A1 2B formats. The switch from the oversized green-on-white plate design to the smaller black-on-white issue came in 2003, starting (allegedly) in the F-A series. A123B is the newest format, starting in 2009 after the four-digit formats were exhausted. Number A677C is actually the first plate I've seen in this configuration on the road.
Moped plates are fairly common in Wisconsin. Most any small motorbike with an engine displacement of 50cc or less qualifies for them.