For 68 marker lights, the round ones anyway, there are two bezels. A flat and beveled (or peaked). It depends on what car they were on. Cars like the 68 charger, where the marker light was placed on the body line, the peaked housing is used. On the Road Runner, where the marker is on a relatively flat surface, the flat housing is used. I think the dart also had the marker lights on the body line. So peaked housing there. Barracuda, like the Road Runner, had marker light on flater surface of panel.