For 65-66 as Charles mentioned they were in the owners manual
Have seen three versions of the owners card.
1- The permanent one sent int he mail to the owner after the sale. Small plastic credit card looking design as shown below
2- A paper version One a temporary one
3- and a plastic credit card style with a metal copy (with out ink printing) glued to the bottom section
Below the owner info on the back of the first page of the owners manual print reminds owners to always keep their owners car in the glove compartment but have seen dealers design and install holders for the small metal door tag copy in other locations