I am going through a box of 1968 side markers, and I see 4 different kinds:

1) Amber lens with "bevel" in the chrome bezel
2) Red lens with "bevel" in the chrome bezel
3) Red lens with a flat chrome bezel
4) I also found 1 Amber lens with a flat chrome bezel

I always though that the Red lenses should accompany the flat chrome bezel for the rear, and the amber lenses were in front with the beveled chrome bezel.

Are there really 4 different types of side marker lenses? Which is correct for a 1968 Barracuda?

Thanks!