moini.net - Jim Moini's License Plates
SONORA - ARIZONA OFFICIAL (OFICIAL)
These plates were apparently used on both sides of the border.
I'm not sure whether they were issued by the USA or Mexico ... some earlier ones resembled Sonora issues so I will include them here.



1931
Mexico Sonora Arizona Official Oficial License Plate
1939
Mexico Sonora Arizona Official Oficial License Plate