8N439756 / 8N439754 POP error

[70 copo]

The issue OP is asking about is how a warranty book with a VIN punched to correspond with the VIN embossed on the protect-o Plate could be wrong?

In the example OP presents the VIN is off by 2 digits.

My investigation revealed that GM found that the addition of the VIN (while a good idea) was far too labor intensive to accurately implement with 100% accuracy absent each assembly location dedicating a specific area and detailing additional personnel to assure accuracy.

This became a simple cost vs benefit equation for GM.

For example at Norwood: Each day one set of many sets of key punched cards key (punched for each car built) were delivered to the cycle bank representing the sequential build for the chassis side production each day numbered 0-1000 (maximal) or typically the end of the days scheduled production usually 900+ .

The cards delivered there were the individual RPO content card which was sorted by the cycle bank operator and then re read by the IBM tabulator which then created the data stream for the AM Graphotype which then automatically embossed the POP as soon as the VIN was assigned.

The same data was transmitted to a nearby IBM Keypunch- Punched Card Typography machine where blank warranty cards were waiting. These cards were then automatically key punched and automatically collated. The next job was for workers was to match the right card to the right POP.

Because the warranty card change mandated by GM was what was called an "unfunded mandate" workers worked in less than adequate conditions in an area not purpose built for this activity, they worked often in low light, older senior personnel were used to complete this task (eyesight was an issue here) and many mistakes were made including machine collation errors and human errors.

The use of IBM Keypunch- Punched Card Typography was considered an overall failure and discontinued at the end of 1968.