The Motor Vehicle statutes of 1905 were amended in 1907 to require the annual registration of all vehicles.  The state also began to reissue marker numbers for passenger vehicle registrations that had not been renewed subsequent to the passage of the 1907 statute revisions.  These replacement markers are easily identified, as they are wider than the originals and have increased spacing between the characters, particularly so with the letter “C” and the initial number.

Starting with marker number C9000 and continuing to C9499, the typeface for the numbers was changed from previous practice.  In particular the number ”1” now featured a serif, a distinctive decorative feature.  A more significant change in appearance took place beginning with number C9500 when the marker-manufacturing contract was awarded to the Ingram-Richardson Co. in Beaver Falls, PA.  The script alpha/numeric style of lettering was terminated at this point.  These new markers, still using white letters and numbers over black porcelain on a cold rolled sheet iron base, featured block letters and numbers.  It is believed that the markers produced ended at C9999, but it is not clear what was the highest number actually issued. The highest number known to exist today is C9985. The block style would continue in use through 1913.

The size difference between an original 1907 – 1909 plate (C2231 - above) and a reissued plate (C2460).

The style of markers used from C9000 to C9499. Note the serif on the number 1.

The block style used from C9500 to C9999.