1970 Duster windshield molding clips

In 1970 the windshield garnish was stainless steel. At some point the factory switched to shi**ty anodized aluminum. That could account for slight changes in clip style and type used at a given location.

I see no reason to believe someone installed 4 of the wrong clip on you car. Like I said, I had 5 distributed across the bottom on mine. My originals match yours.