These plates are issued to passenger vehicles for temporary registrations – such as when purchasing a used car or registering a car temporarily in order to have it inspected for permanent registration.
These are verified back into the 1940s, as cardboard plates similar to the design of the 1954 pictured below. Various design tweaks as pictured below took place over the years.
These plates have holes punched in them for attachment in the same manner as a regular plate, however they often appear taped inside the rear windshield of the vehicle.
These plates are now valid for a period of 10 days.
In 2015 the design of these plates was completely overhauled.
Up until the early 1980s there were also metal temporary plates of similar design to regular passenger plates, with a ‘T’ suffix. These were typically used for vehicles whose plates were lost.
From 1992 until the late-2000s, when purchasing a new car, the car was issued either regular passenger license plates through the dealer or a yellow ‘Temporary Registration Certificate’. These are detailed on their own page.
From a 1937 Cord Phaeton Conv. bought from an individual in Haddam, CT on Nov. 27, 1964
Very nice condition for one of these plates
The “CONN” legend lost its serifs sometime between late 1967 and early 1968, possibly as the numbering series rolled over. The date legend typeface was changed as well.
Next, a letter suffix was introduced.
1978. Numbering series rolled over back to ‘A’.
I have no idea why the caption was reversed from “TEMP. PASS.” to “PASS. TEMP.” for a short period of time.
Minor change in formatting.
A new numbering format was introduced in 1987. A full-sized letter was used for the first time.
The “computerized” design came out in 1988, and the plates were changed from printed cardboard to a lighter cardstock.
Very slight changes in the font for the “CONN” and lower legends.
The more “modern-looking” computerized plates came next. However, the fonts for the “CONN” and lower legends took a step backwards to the previous design.
I’ve about given up on trying to figure out the numbering system on these plates.