This is a new old stock group of 8 Champion brand RBL-11Y spark plugs.  These fit the following; 1970 Buick with 455; 1970 Chevrolet with 402 and 350HP; 1972 Mercury with 429 and 14MM heads.   These are new and still in original packing.  These may fit other other models  but check first before purchasing.  Please see photo.  Buyer to pay shipping.