Comment first by a guy in Austin, TX who said: Effective immediately, PCNA will no longer be including engine and transmission numbers on COA's for cars manufactured prior to 1979 UNLESS you can verify those numbers when you order your COA. In other words, if you don't already know your engine and transmission numbers, Porsche is not going to tell you. From their email to me:
Please be aware that for security reasons, Porsche Cars North America now requires you to provide the original engine/transmission number for classic vehicles (1979 & older) in order to list the engine/transmission number on the Certificate of Authenticity. If you are not able to provide the original engine/transmission number, the Certificate of Authenticity will list 'Not Confirmed' for the engine/transmission numbers.
Having been personally involved with setting up the CoA program, I know PAG even in the beginning had "a Problem" with providing what they perceived as personal and protected information about cars sold to customers. Too bad it's now come to this. Read further discussion over at Early 911S Registry.