Have two questions on this 1983 D. I only went to Vista RPM example and not even close but had to ask in case I missed something. Second is if that is a lamination, die chip or something else on the side next to T? It doesn't look like a die chip but the force press uses in strike probably has the capability.
Do you see how the whole date is like that? The mint mark just went along for the ride, that's just strike doubling.