Engine serial number/COA conflict?, Engine number Options

[morsmanlaw]

I have a '75 2.0. The COA provided by the Porsche dealer I purchased it from lists the "Engine number/type" as "46N749." The serial number on the engine is GC001357. The VIN on the COA is a match for the car. Is the "engine number/type" something other than the serial number of the engine?

[dr914@autoatlanta.com]

The COAs have run their course. No longer will Porsche put the engine nor transmission number on the document unless you tell them YOUR number, so finding out originality is virtually impossible. They are worried (rightly so) that as these cars become more valuable, unscrupulous people will find out the original matching engine and transmission numbers and restamp mismatches, to enhance the value of the car. You may remember the current case of Jerry Seinfield and the carrera speedster that had restamped numbers from getting the incorrect information after the porsche factory had changed the engine. There was scuttlebutt that it was a common conversion about "call so and so and get that case restamped"

So we collectors who truly want to do the right thing suffer. Right now I am trying to reestablish the identity of a 70 911 stolen and recovered in the early 70s with an assigned number and re registered (legitimately) with that number, transmission number ground off engine number severely altered, all I have is the original production number grease penciled on top of the steel dash buck. Although Porsche has the information and could help me they are mum. propriety information