This is a vintage set of 'Firestone Steel Radial 500' raised white letter tires. Size GR-70/15.  This is a rare matching set of 4. Matching set of date codes 'M7317'; these were made the 31st week of 1977 (April). These would be correct for any 1977 Corvette made from a mid to late April production date until the end of the model year in August. Very difficult to find a set of these tires with matching date codes. Would be perfect for a mid late year production 1977 Corvette for NCRS or Bloomington judging. 

ABSOLUTELY NOT FOR STREET USE!!  ONLY FOR NCRS FLIGHT & RELATED JUDGING FUNCTIONS!!  NOT SAFE FOR REGULAR USE.  WOULD ALSO REQUIRE TUBES TO HOLD AIR PROPERLY.