The larger emblems do appear to be the later over the counter Challenger replacements. As mentioned, original assembly line emblems will have the clear coating over the colored parts of the emblems, but I have seen very few NOS examples with the clear on them. Without looking up part numbers, the clips on the back are what confirm that they fit Challenger. Charger sail panel emblems are also the same size but have a hole in the center and attach with a screw instead of the clips.