Porsche usually puts the part numbers on the back of the wheel right (not under the tire, right?)

 

Correct

 

IIRC, the offset will be near the valve stem if they are factory wheels as well.

 

C2 turbo replicas would be my guess

 

Cyrus951 they look like those mystery wheels DangerIslandII have.

 

I believe they are the 17' 968 wheels. (Don't know what they call them officially, though) Clem (a fellow Rennlister) sold me his 968 16's when he upgraded to the 17's that look identical to his old 16's.

Did I confuse you yet?
-Z-man.

 

I have the same rims on my car. Except mine are polished and a little more rounded off. They are C2 Turbo wheels, more than likely.

 

Actually I think you just confirmed this:

They're the optional 17" wheels from a 1994 968.

What they're called....nobody knows, but that's where they came from.