[MysteryTrain]

Here in CA, you keep the same license plates year to year even though the styles of the plates change by the decade. Cars here are often listed as "black plate" cars to designate original 1960's vintage. This car shows the yellow on black plates that would be found on a true original.

I don't know if it is possible to obtain a black plate for a car that wasn't registered in the 60's . . . maybe a fellow SoCal or NoCal could answer.