[Baron Von Zeppelin]

The prefix on the Invoice ID is PPB (262655)
P = Dealer Order - or - Customer Ordered through dealer.
P = Pontiac Plant
B = Approved Private Bank Line of Credit (how the dealer paid PMD for car)

Doubtful that very many WW5's were dealer ordered for inventory on their sales lot.
Most likely a very very large percentage were hand picked special orders placed by customers. The WW5 option instantly made them very expensive cars for their sales class.

If you find your build sheet , it can usually tell if it was a customer special order.
I only have 3 WW5 B-sheets , all 3 say XXX CUSTOMER ORDER .
Would easily bet yours was a hand picked customer ordered car.

The window of time for others that may possibly be priced like yours is only about 2.5 weeks. And that could shorten as we get more examples.
Right now it looks like a window from 11/24 - 12/11

Any Lemans Hdtp or GTO Hdtp in that time span would provide example.
I don't have any others on hand in that time span.

Would be glad to see any other WW5 Invoices you have.
Send me a PM.
Thanks !