can anyone help me with a part number?

[Dennis]

It is indeed a 944 rotor. It's from a 944 S (87-89 model years) and will work in place of a 944 turbo rotor. I believe the .05 at the end of the part number indicates that it is for cars equiped with ABS. The MIN.TH.0,751 INCH means that the minimum safe thickness after resurfacing is .751 inches or about 3/4 of an inch. Machine shops use that information when the rotors are to be resurfaced and trued-up. The new dimensions of the rotor are 298mm diameter and 28mm thickness.