I've got a Courier from about the same time frame as yours. It looks like the grommet may have been replaced on mine because it looks silver-ish? I'm not sure though.
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Mine look just the slightest bit lighter in color overall from the buckles, and there are small spots that have worn to silver. I will try to take a pic when I get home, but I'm not sure if the camera will pic it up. Maybe yours are original just a bit more worn?