1900s-1972: Decentralization
The first formal license plates were assigned in the 1900s, although few records exist of those. The period between 1916 and 1972 was the most prolific in designs. Since each district was allowed to issue its own license plates, it is possible to find a small piece of history of each one just by looking at their past plates.
Read more about this topic: Vehicle Registration Plates Of Argentina