Unused key blank.  UN16 (UN 16) on front.  F68 XR (F68XR) on back.  1960-70 era import car door and trunk key.  Tested on a 1965 Volvo 122s and works perfectly (note: can't confirm that the lock sets are original to the 1965 car).  Check your key closely for correct application.  Sorry, no refunds on returned keys blanks that have been altered in any way.  Volvo Part#: 660138.  May fit keys with part numbers: VO27, UN90, UN120.  Thank you!