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I need some more professional help identifying or determining PMD etc.
Coinscratch
Posts: 9,742 ✭✭✭✭✭
First up, 1976 5c, extreme heat, PMD?
Next, 1958 D 5c, almost looks like D/S but only finding D/D in coinfacts.
Then, 1914 1c, obviously PMD but does anybody know why?
Then again, 199? 1c, Struck through grease? Value?
And 1990 D 1c, PMD? Strange pattern.
And finally, 1978 D 1c, filled D? I've seen a few of these so, I'm guessing value is 1c
As always, thanks for the free professional help, my wife really appreciates it 
1
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It might help if you study how coins are actually made and how true errors come about. Knowing the series design is also very helpful.
If you Read All the various posts here on PMD errors you might be able to figure it on your own?
The first coin, the nickel...could be heat, I do not know...never saw that phenomena before. The 1990D cent just has gunk on it.....Cheers, RickO
I think all are pmd. Quite the variety. The black goop is Wawa parking lot asphalt. Peace Roy
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I think you have some PMD, a die chip (D), a cent with maybe grease or over-polished die (weak details but also thin but well struck 9s)? The asphalt cent is clearly PMD - that is a no brainer and should not have occupied any of your time (the gunk is above the details - if that was on the planchet and stayed raised after striking then that means the face of the die never reached the planchet's surface in which case no detail would have been struck up.)
That cracked nicked is very interesting. Not sure that heat would do that - maybe a combination of extreme cold (like liquid nitrogen) and then extreme heat?