If the clad layer was missing, it would show either a bright or toned copper color. I would also expect the strike to be soft because of the missing mass of the planchet. Here's an example of an older
Washington quarter that was missing the obverse cladding. It was 1 gram under weight when it was struck.

ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!!
