The Fords sold in South America during the '30s were either wholly or largely of U.S. manufacture and without exception all of the engines used in those cars and trucks were produced at the Rouge Plant in Dearborn. Since Ford's VINs were engine numbers at that time, the VINs in South American Fords were part of the same sequence of numbers as the Fords sold in the U.S.
In three countries, Argentina, Paraguay, and Uruguay, an F was added to the engine number prefix (i.e. BF and 18F) indicative of the vehicles there having right hand drive (until 1948), but the engine numbers that followed the prefix still were part of the running sequence of numbers issued at the Rouge. In the other South American countries the VINs have the same prefixes as in the U.S.