replacement engine

[ZIMMERMANN JEan-Luc]

Hi

i'm new on this forum. I bought several weeks ago a Porsche 356C coupe.
The car is matching number except the engine, that is stamped ATxPx733208
I didn't find a lot of explanation how to decode this VIN

AT seems to be for an engine replacement. But was it a factory or a dealer replacement ?
Obviously, the original VIN number has been erased. All other markings also have been removed. This is for me the clue that it's an engine providing from another car that was reconditioned.
Notice the stars have been replaced by a "X". Does somebody still have seen that kind of marking ?
As far i know, the highest range attributed to a 616/15 engine is 733028 -> 733197. My engine has number 733208 (11 above the highest engine officially produced)
Did Porsche factory continue to count ahead and attribute next free number to replacement engines ?

Any information is welcome

Thanks in advance

Jean-Luc

[Mike Wilson]

A quick Google search turned up the following: KD indicates a factory rebuilt engine. AT indicates a factory replaced engine.

[John Wurner]

Hi
I believe AT is Aus tausch, which is exchange as Mike said.

[Mike Wilson]

Thanks for the German translation, John, and welcome aboard Jean-Luc.

[Jacques Lefriant]

BOGUS

[John Wurner]

I also have concerns, as I have never seen the factory use an X like in this case.
John

[ZIMMERMANN JEan-Luc]

According to a hand annotation that i found in an old workshop manual that was remaining in the car, the engine was replaced in January 76
Previous engine number was 711209

At this period, the car was registered in Texas

[James Davies]

Very cool documentation. =)

[Jim Karaba]

The fonts on that engine are wrong too. That 7 is not a German 7.

[ZIMMERMANN JEan-Luc]

The fonts on that engine are wrong too. That 7 is not a German 7.

found pictures on the web with same kind of font

d7b593a6Porsche_356SC_SerialNum.jpg (153.92 KiB) Viewed 5107 times

[cory cotherman]

engine number 711209 is in the data base...

[Doug McDonnell]

My car had an AT motor in it when I bought it. The AT motor was purchased complete from Stoddards by owner #2 of my car. KD motors were factory exchange. AT motors were dealer exchange. I believe both were rebuilt at the factory. My AT motor and further discussion in this thread: viewtopic.php?f=1&t=36948 I do not believe the X was ever used in number stamping by Porsche in 356s

[ZIMMERMANN JEan-Luc]

engine number 711209 is in the data base...

in which database ???

[Doug McDonnell]

VIN DB at top of page.

[Doug McDonnell]

At least you were told your engine was not original. So you were not deceived. Whoever stamped that 3rd piece was not fully versed in how Porsche stamped 3rd pieces though.