Argentina

Neuquen province, 1968

La Pampa province, municipality of Damian Maisonnave, 1949, Truck (Camion)

Entre Rios province, 1935

Brazil

Rio de Janeiro province and city, 1977

Chile

c.1950s, front plate used on consular vehicles in the United States in addition to a local license plate

I found this and several others at an estate sale in the Puget Sound area, and suspect these may have been used on vehicles owned by the Chilean consulate in Seattle.  The hole patterns indicate it predates the 1956 size standardization of U.S. plates.

Colombia

c.2001, Santa Fe de Bogota locality

Cuba

c.1989, taxi

El Salvador

1930 ox cart

These small plates were manufactured by the Irwin Hodson company of Portland, OR.

Mexico

Puebla state, 1942

Uruguay

Department of Durazno, doctor.  Date unknown

Venezuela

Fire dept, state of Bolivar, municipality of Heres.  Date unknown

This plate is made of heavy cast aluminum

1937, state of Zulia, municipality of Maracaibo