1943 RPM Penny. D Over A S

With my limited experience with error coins and a very strong magnifying glass ----I think it's a S over a S. Thanks for helping.

If this had been a S over a D, would it have been a rare find?

1. A coin shop is likely to know less than the owner about this coin. Most dealers don't know squat about die varieties and couldn't help you if they wanted to. Suggesting the owner take the coin to a coin shop for a correct answer is not only showing WAY too much credit given to dealers, but is rather offensive to the people here who have made die varieties and errors their life study and are quite qualified to look at a decent photograph of a coin and give a correct answer as to what caused it to be what it is. Trust me...we know WAY more than any dealer about the subject.

2. Die wear shows in odd ways on steel cents. There was no testing done on these before they hopped into the fire, and the dies didn't behave the way they had expected. Die wear was very common and very odd in appearance because they were striking steel planchets with steel dies. Someone didn't seem to understand common metallurgy in that striking a piece of metal with another piece of metal of similar hardness is NOT going to produce positive results. Mark up another brilliant move on the part of our government.

3. I already answered as to what this coin is. It is die wear. There is no S over S or S over D or anything to that effect on this coin. Taking it to anyone, paying to submit it, or anything else would be a waste of time and money. It is a common steel cent. I have seen tens of thousands of steel cents in my time and am qualified to give the correct answer to the question in this thread.