Mrmerlin

FWIW not all of the factory wheels have the numbers next to the valve stems.
A factory wheel will have the Porsche part number cast into the rear side of the wheels.
That lets you know its a factory part, just going by numbers next to the valave stem is not an accurate way to tell

BHMav8r

I just sold the wheels off my 92 964 because they were chromed - the part no's and offsets were correct but they did say made in Italy on the castings... I was curious too... Those Italian cars start with the "F" word...

boxsey911

My MM cup 1 replicas (made in Italy) don't have Porsche part numbers on them so my thinking is that wheels with a part number must be originals.

IrocMan

Cobalt is right,
The cups and some other rims such as the 993 targa rims are Speedline made in Italy. I visited the factory in 97 and saw the porsche rims being coated !

I have some old racing cups (different offset and larger holes) directly bought from Motorsport in Germany and they are tagged made in Italy :

morrisroad

Check out this web link on Cup Rims with good pics on the stampings and specs.... http://www.rsamerica.net/OEMinfo/wheels/index.htm

cobalt

That is a good reference. It also shows the .01 version in 8" size which looks entirely different from the rear.

PAOLOP

The 8" ET 52 rims are the rear ones of 964 carrera 2/4

993James993

Resurrecting an old thread: Does anyone know if Speedline made the D-90's or the 993 Cup II's? Both are made in Italy.