These are brand new rotors - they just had a light dusting of surface corrosion from a little moisture in storage.  They are in top quality shape - please see the pictures.  These will fit the back of a a1985.5 and 1986 Porsche 911.  They are early offset.  The Zimmerman part number is 460 1009 00 and it also says 901 352 041 14 on the box.  Made in Germany!  

Please double check fitment - I believe these are for a 1969 to 1983 Porsche 911.