The modern Vehicle Identification Number started in the 1950's. Before 1981 there were many different formats. In 1981 a 17 digit format was established.
Many state DMVs will use the engine (frame) number as the VIN. Some Model As have had engine swaps over the years. Also some engine re-builders would re-stamp the engine numbers when they rebuilt an engine.
However in your case I think the VIN on your title is actually the body assembly plant number. Specifically the one from San Francisco, SFA. That number was usually located on the body cross rail in front of the front seat.
By the way VIN stands for Vehicle Identification Number. So when one says VIN Number one is saying Vehicle Identification Number Number.
https://archive.mafca.com/downloads/...y%20Number.pdf
Bob