Rear window molding clips

I've got an open set of clips from Year One for '70-'76 Duster & Dart Sport (??? '71-'72 Demon ???). It says front and back but has 2 different styles. That seems to suggest that there is some sort of pattern/mix for both styles, front & back.

1966-74 A B E-Body Front Rear Window Reveal Molding Clip...