General All-Lock Credit Card Key Blank Plastic Card Key Set Lot of 5.  on the plastic emergency key set there are letters on it:  GMJ OPERATES IGNITION AND DOOR.  GMK operates glove box and rear.  they were produced vehicles 1970s, 1980s early 1990s. All 5 are the same.  NEW OLD STOCK.  UNUSED and intact within original plastic cards.  Made in U.S.A.  Please see pictures for details. thanks