I was looking at a couple of NL320's today and one of them had a really strange serial number. The number on the bottom of the data plate read NL320-3-xxxxx which I understand the "3" to mean it was built in 1963 but the "model for year" on the top of the data plate read "1965". It had a 1963 grill and turn signal indicators but the model for year definitely said 1965.
How could a truck be built in 1963 but was a 1965 model?