Reference manuals show these as #'s 37200-374-671 / 37240-323-773. They match both '75 and '78 CB 550 Fours. However due to the vagaries of Face Plates, buyer should double check themselves if correctness is an issue. Tested as far as could be off the bike and cluster/face plate lighting are functioning. In great shape, staining on speedo needle, glass is scratch free.