There isn't any way to tell that I'm aware of. The issue with the WAM is that the reverse die was incorrectly prepared from the proof master die, rather than the master for circulation strikes. There might be different obverse dies, but best case scenario the die pairings would be completely random. The WAM error was made over 3 years from 1998-2000, so it seems that the mistake was made several times at least.
I'd skip on trying to figure out if your cheerios penny is a WAM unless you want a TPG to do it for you; a cheerios penny in its original holder goes for $5 on ebay, but it becomes any other penny once it comes out of the holder. Even if it turns out to be a WAM, its status as a Cheerios WAM is lost unless recorded by a grading service. In essence, you'd be wagering $5 on it being a WAM... I'd stick to change-checking.
I'd skip on trying to figure out if your cheerios penny is a WAM unless you want a TPG to do it for you; a cheerios penny in its original holder goes for $5 on ebay, but it becomes any other penny once it comes out of the holder. Even if it turns out to be a WAM, its status as a Cheerios WAM is lost unless recorded by a grading service. In essence, you'd be wagering $5 on it being a WAM... I'd stick to change-checking.


















