1971 Hood Scoop parts - How can I tell if they are original or repro?

I have a complete set of hood insert parts with the plastic grill plates for a 1971 GS. I'm sure the inserts are original with parts numbers of 1231852 and 1231853 but am unsure of the plastic inserts and the under hood plates. The plastic inserts have numbers that have been scratched out but look like they begin with 123XXX but, I can't make out the rest. The under hood plates have 850 RT and 851 LT stamped on them.

So, do I have original parts or, repros? I want to be sure before I advertise them on the For Sale forum. Here are pics.

 

I think the only thing ever made repro were the flat plates.

 

You mean the ones that go under the hood and mate up with the foam elements?

 

Yes.

 

Gerry, do you read tarot cards too?

 

Pics added. So, are they original? o No:

 

the parts place repo's all of that now but there stuff usually is marked as such

 

The plates look original. What are the rivets in the scoops?

 

Rivets? I think you mean the hardware screwed into the re-tapped holes in the undersides. I wanted to show that the holes had been repaired and re-tapped for fine thread machine screws.