1937
passenger
Mexico 1937 License Plate Placa
passenger
Mexico 1937 License Plate Placa
commercial
Mexico 1937 License Plate Placa commercial publico
1938
passenger
Mexico 1938 License Plate Placa
commercial
Mexico 1938 License Plate Placa commercial publico
1939
passenger
Mexico 1939 License Plate Placa
passenger
Mexico 1939 License Plate Placa
commercial
Mexico 1939 License Plate Placa commercial publico
 
From 1940 to 1946, the letter prefixes are the only way to tell what state passenger plates are from.
Below is a list of the known prefix letters.
A = Aguascalientes B = Baja California C = Coahuila D,E,F = Distrito Federal
G = Guanajuato &
        Guerrero
H = Hidalgo J = Jalisco K = Chihuahua
L = Nuevo Leon M = Mexico N = Nayarit O = Oaxaca
P = Puebla &
        San Luis Potosi
Q = Queretaro S = Sonora T = Tamaulipas
U = Durango V = Veracruz X = Sinaloa Y = Campeche,
        Colima,
        Morelos,
        Yucatan
Z = Michoacan,
        Tlaxcala,
        Zacatecas
? = Chiapas, Quintana Roo, Tabasco

R = ?


1940
passenger - BAJA CALIFORNIA
Baja California Mexico 1940 License Plate Placa
passenger - DISTRITO FEDERAL
Distrito Federal Mexico 1940 License Plate Placa
passenger - DISTRITO FEDERAL
Distrito Federal Mexico 1940 License Plate Placa
passenger
Mexico 1940 License Plate Placa
passenger
Mexico 1940 License Plate Placa
passenger - TAMAULIPAS
Tamaulipas Mexico 1940 License Plate Placa
commercial
Mexico 1940 License Plate Placa commercial publico
1941
passenger - BAJA CALIFORNIA
Baja California Mexico 1941 License Plate Placa
passenger - NAYARIT
Nayarit Mexico 1941 License Plate Placa
passenger - SONORA
Sonora Mexico 1941 License Plate Placa
passenger - TAMAULIPAS
Tamaulipas Mexico 1941 License Plate Placa
passenger
Mexico 1941 License Plate Placa
commercial
Mexico 1941 License Plate Placa commercial publico
dealer
Mexico 1941 License Plate Placa dealer demostracion
1942
passenger - BAJA CALIFORNIA
Baja California Mexico 1942 License Plate Placa
passenger - JALISCO
Jalisco Mexico 1942 License Plate Placa
passenger - CHIHUAHUA
Chihuahua Mexico 1942 License Plate Placa
passenger - NAYARIT (repaint)
Nayarit Mexico 1942 License Plate Placa
passenger
Mexico 1942 License Plate Placa
passenger - QUERETARO
Queretaro Mexico 1942 License Plate Placa
passenger - SONORA
Sonora Mexico 1942 License Plate Placa
passenger - SINALOA
Sinaloa Mexico 1942 License Plate Placa
commercial
Mexico 1942 License Plate Placa commercial publico
dealer
Mexico 1942 License Plate Placadealer demostracion
1943
passenger - BAJA CALIFORNIA
Baja California Mexico 1943 License Plate Placa
passenger - DISTRITO FEDERAL
Distrito Federal Mexico 1943 License Plate Placa
passenger
Mexico 1943 License Plate Placa
passenger
Mexico 1943 License Plate Placa
passenger - SONORA
Sonora Mexico 1943 License Plate Placa
passenger - DURANGO
Durango Mexico 1943 License Plate Placa
passenger - VERACRUZ
Veracruz Mexico 1943 License Plate Placa
commercial
Mexico 1943 License Plate Placa commercial publico
1944
passenger - BAJA CALIFORNIA
Baja California Mexico 1944 License Plate Placa
passenger - CHIHUAHUA
Chihuahua Mexico 1944 License Plate Placa
passenger - NAYARIT
Nayarit Mexico 1944 License Plate Placa
passenger - QUERETARO
Queretaro Mexico 1944 License Plate Placa
passenger
Mexico 1944 License Plate Placa
legislature - TAMAULIPAS
Tamaulipas Mexico 1944 License Plate Placa legislature poder legislativo
commercial
Mexico 1944 License Plate Placa commercial publico
dealer
Mexico 1944 License Plate Placa dealer demostracion
1945
passenger - DISTRITO FEDERAL
Distrito Federal Mexico 1945 License Plate Placa
passenger - CHIHUAHUA
Chihuahua Mexico 1945 License Plate Placa
passenger - NAYARIT
Nayarit Mexico 1945 License Plate Placa
passenger
Mexico 1945 License Plate Placa
passenger - QUERETARO
Queretaro Mexico 1945 License Plate Placa
passenger - VERACRUZ
Veracruz Mexico 1945 License Plate Placa
passenger
Mexico 1945 License Plate Placa
commercial
Mexico 1945 License Plate Placa commercial publico
1946
passenger - BAJA CALIFORNIA
Baja California Mexico 1946 License Plate Placa
passenger - CHIHUAHUA
Chihuahua Mexico 1946 License Plate Placa
passenger - NAYARIT
Nayarit Mexico 1946 License Plate Placa
passenger - QUERETARO
Queretaro Mexico 1946 License Plate Placa
unknown type - VERACRUZ
Veracruz Mexico 1946 License Plate Placa
commercial
Mexico 1946 License Plate Placa commercial publico
commercial
Mexico 1946 License Plate Placa commercial publico