Side Cover Identification

[BillinSC]

I have a 1973 C 750K3 I bought used. How can I tell if the side covers are original OEM parts or later reproductions. I dont see any molded in identification markings or part numbers on the back side of them so I'm guessing they're repro's that were re-painted.

 

[pickleknuckles]

Post a pic. You can tell by looking at the backsides. New ones tend to be a black or really white material. Original are a yellowish material.

Pics are the originals off my Freedom Green K4 vs the new Yamiya covers I have on now.
If you zoom in on them you can see differences in the moulding marks and texture.