How to ID original 426 Hemi covers versus repros

[busterb]

How can you identify original 426 Hemi valve covers versus reproductions? Pictures with circles and arrows appreciated!
I have a pair that will be for sale as soon as I am sure the black wrinkle ones I refinished seal correctly.

 

[busterb]

I should have said chrome valve covers; how do you tell originals from reproductions?
Here are pics of mine.

 

[Runcharger]

Those are probaly originals. I don't think the repros had the spark plug tabs.