I have a 1958 Apache 3600 Napco 4x4 that has some interesting vin numbers stamped on the frame. The last number is the issue. The last number on the cab tag is 9. On the frame all of the numbers match except the last number. You can clearly see that it was a eight but it is "x" out with a #1 punch in a cross pattern. Then directly above the eight is a 9 punched in. I found this on the undercab vin number and the forward of vin cab number on the left frame rail.
factory mistake???

about two weeks ago i finnally got a truck i have wanted most of my life. its a 1958 Napco 3600 wide window stepside long box. it has been sitting in a field being neglected this whole time. it is now in my shop and i am working to get it going again.