Chapter 130 of the Public Acts of 1905 became law in mid-1905 and contained numerous changes to the 1903 motor vehicle legislation.  All currently licensed passenger vehicles had to be re-registered with the office of the Secretary of State by October 1,1905.  As was the case with the 1903 legislation, the 1905 statutes called for permanent registrations.  Each current and all new registrants were issued a pair of state supplied marker plates to be displayed on the front and rear of their vehicles. From October 1, 1905 to the present time, with the exception of the 1980-1986 period, front and rear markers have been required in Connecticut.  These new markers featured a script "C" followed by up to four digits and were white against a black background.  They were made of cold rolled sheet iron with a porcelain finish.  Both markers had a bolt hole in each of the four corners.  The front marker additionally featured two slots in the top.  These were intended for those situations where it was not possible to directly attach the marker to the vehicle.  In those cases leather straps passed through the slots would allow the marker to hang from the machines front axle.

The Brilliant Manufacturing Co. of New York produced these new markers for the state.  They have a date of manufacture code fired into the white porcelain on the back of the marker, usually in orange, yellow or gray.  Use of markers made or supplied by the owner was prohibited after October 1, 1905.

The top marker was intended to be used on the front of the vehicle.

A June 1906 date of manufacture code on the back of these markers.