My '76 has a 10-75 build date, so theoretically, yours should have them too. I could see clear ones getting onto a very early car (depleting the '75 stuff), but not vice versa.
Make sure the car in your pic has the correct parts and is indeed a '76 (build date would indicate so). I can't see the inside rear view mirror or the antenna hole to be sure.
I looked again, it appears the grille at one time may have been installed in a Valiant. The Duster grilles I've seen were painted black on the horizontal surface in front of the signal lenses. All Valiants I've seen are silver, like the one in your pic.
