Hi Reed : I thought I would chime in after reading this thread, my 1971 350 GTR has both the front Amber reflectors , and rear Red reflectors. I acquired this gem from the original owner who said "it is in stock form as he ordered it in 1971 " yet the code on the lens is " SAE B68 OEW R309 . Did BridgeStone use reflectors from 1968 ( if B68 means that date ) on newer bikes , or never changed the code on the lens ? Thnks Randy