70-2 2 piece rotor - How to tell original?

[FRLew39]

I have the attached rotors and I am not sure if they are originals or not. Would someone be able to ID & explain what makes an original?

 

[dadsbee]

Looks right..

 

[PurpleBeeper]

They look correct

 

[Orig69]

That rotor looks like it's in good condition.

Do you have pictures of the other rotor?

 

[FRLew39]

That rotor looks like it's in good condition.

Do you have pictures of the other rotor

Thanks for the replies/information. I attached a photo for the second rotor. I measured them and they are below the recommended minimum thickness unfortunately.

 

[tullm]

No doubt you have two piece rotors. I can't tell if they are factory or older aftermarket without better pics. The attached images are of a Kelsey Hayes two piece rotor assembled the 90th day of 1971 off of a 1971 Challenger. Notice the casting and the heads on the wheel studs. The aftermarket rotors (Bendix, Centric, Wagner, etc.) have different numbers cast into the rotor and different wheel stud markings. Also, notice your rotors have a rounded edge under the hub (3rd pic in your original post), I usually see that style on E-Bodies. I thought original B-Body rotors had more squared edges in said location? For full disclosure, most of my experience is with E-Bodies so I could easily be wrong regarding my B-Body assertions.