Numerous irregularities in BHC/EUN criteria from a few plants - in 1968.
Baltimore and Framingham [GTO] were the 000000 specialists
Van Nuys [Bird] 000000 also
The WSxxxx would have been a flukey Fremont Deal
All these cars/engines would have had a normal 6 digit EUN.
Anywhere from 20,000 to 50,000 digits lower than the Invoice Number
Don't know how or why they got by with the goofed entries.
The billings weren't created until the cars were completely built and ready to expedite.
This a WS [rpo 348] car from PMD Plant