Duster Hubcaps & Trim Rings?

Need your trained "a-body eyeballs" on this:


Check out the (expired) eBay auction on this 1974 Duster. (<--not mine)


Check out the several photos of its trim rings & hubcaps.


Was that particular combo a common option for 1974?

I like it...just had never encountered it before? Was it factory?

(Have seen the caps, but not with the rings.)


------------- eBay auction # 120223549327 -------------


Thanks for your help & expertise!!