original or repo fender

[dmastr3665]

is there any way to tell if a fender is original or repo 1974 Barracuda,  the only marking on it as numbers one set stamped on the inside support, then there's another set stamped on the headlight backing plate and 2 sets of numbers along where the bolts go under the hood 
there are also a series of 4 or 5 numbers on the backside of the headlight backing, none of the numbers seem to mean anything like a vin number  one set is 623B392 on the left and 622B281 on the right, just trying to figure out if these are original or aftermarket fenders

[anlauto]

That's an original fender in my opinion