VIN & Date / Casting Codes (Pre-1981)
The 17-character VIN was standardized for 1981 model-year vehicles. Earlier VINs were manufacturer-specific and shorter, so decoding depends on the marque.
Casting Date Code — Month Letters
| Letter | Month | Letter | Month |
|---|---|---|---|
| A | January | G | July |
| B | February | H | August |
| C | March | I | September |
| D | April | J | October |