Regarding Chubut's license plates, it should be remembered that this province was one of those that continued issuing license plates by locality until well into the 1970s. In the 1960s, many of its license plates had only the name of the municipality printed on the aluminum tab, along with the year (examples: 1962 #1592 for Gaiman and 1966 #2636 for Esquel). The first digit on the left of the tab corresponds to the region into which Chubut was divided: "1" for the eastern municipalities, "2" for those in the center, and "3" for those in the west of the province. Others did have the name of the locality printed on the plate, such as the Lago Puelo license plate from 1961 #013. There are also provincial license plates, such as the 1958 "Test" (Ensayo) category, which were probably distributed to all dealerships under a unified provincial registration (#08 A 261 of 1958). On page 2, left column, there is another one from 1957, #5907, also from the province. As can be seen, there are always rare pieces that make it impossible to confirm any rules; one must rely on what is available, because unfortunately, there is no bibliography on these topics. A curious fact is that some plates for this province say "Prov. DE Chubut" and others say "Prov. DEL Chubut". It is not the only province with this detail.

In the province of Buenos Aires, starting in 1937 (Law 4490), the issuance of license plates bearing the name "Buenos Aires" began, leaving behind the issues bearing the name of each provincial District . From 1937 to 1942, we could say that the license plates were fairly standardized in terms of design and size, all very large and heavy. In 1943 and 1944, aluminum tabs were used on the same license plates issued in 1942. The most coherent reason I've heard is that during World War II, when there was a shortage of metal, the tabs were a good solution to avoid issuing new license plates. This is very likely the case, given that in 1945, to manufacture the license plates for that year, many unused plates from 1938 and 1942 were used. After being flattened, they were re-stamped with the year 1945. This recycling of the plates caused many of them to have holes or missing material. Curiously, the year and number with which they were made years earlier were clearly outlined on the plates, and they can be read clearly. In 1946, smaller plates were issued. In 1947 and 1948, aluminum tabs were again used to validate the plates. The same thing was surely done in 1949, although I have not yet seen any tabs with that date. Between 1950 and 1952, another license plate format appeared with large aluminum tabs for each of those three years (plate #318-062), in yellow with black, black with yellow, and blue for the "No Charge" category. After 1953, no plates with the date printed or with spaces for any type of tabs are known. All were similar to plate #985-286. In the 1960s, there was some kind of license plate chaos in Buenos Aires: many of them looked more like homemade, others featured dealership advertising, and many even had the numbers hand-painted on a piece of sheet metal.

The province of Río Negro had license plates by locality until 1959. Between 1961 and 1962, they continued to be issued in the same manner but based on a type of provincial license plate, with two initials on the left, an aluminum tab with the year, and three digits corresponding to the license plate number. Interestingly, the two initials chosen for each locality are the first and last letters of the city or town's name. For example, SE corresponded to San Carlos de Bariloche, AN to Allen, and II to Ingeniero Jacobacci. In cases where there was a coincidence, another combination of letters was sought: Cinco Saltos and Cervantes had SS and CS respectively, and San Antonio Oeste, which couldn't have SE, obtained SO. Private car license plates were black and white, taxi license plates were red and white, car dealership license plates were yellow and white, and official license plates were black and white. I haven't made much effort to collect these license plates either.

In San Luis province, there were two distinct models of provincial plates: a more traditional model that began in the mid-1950s and a more extended one that possibly began in 1964.

Regarding license plates from the province of Tierra del Fuego, only Ushuaia and Río Grande were issued. I don't have exact information on when they began issuing their provincial license plates, since I only have one from 1953, but that tab isn't the original. I also don't have exact information on San Juan or Jujuy.

Before being declared provinces, some of them issued plates while still being Territories or Governorates . La Pampa, for example, became a province in 1951, but its plates issued before that date make no reference to it being a Territory. Neuquén and Santa Cruz did . I have also seen a plate that says "Territorio Nac. del Chubut" for the town of Puerto Madryn, although it doesn't have the year printed on it. There are no known pieces from Río Negro that make specific reference to it being a Territory.

During the years 1956 and 1957, and for a period of 18 months, the National Territories of Santa Cruz and Tierra del Fuego formed what was known as the "Patagonia Province". During this period, plates were issued under this name, although it is said that it was never legally established.

The southern part of Chubut Territory and the northern part of Santa Cruz Territory up to the Deseado River formed a region called the "Military Government of Comodoro Rivadavia". Plates were issued under this name, and also under the name "Military Zone of Comodoro Rivadavia". This occurred between 1944 and 1956 .