Lincoln Cent errors ??

While searching through some Wheats yesterday I came across these coins and was wondering if I could get some expert advice here.

57D looks to me like a lot of material between the B and E for it to be post mint.
1:

Also a 57D
2:

One more 57D. This one also has the filled in 9 like above.
3:

A 52D with the mint mark pretty darn close to the date.
4:

Thanks for looking!

 

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The first three cents show die chips.

 

I agree and the fourth had the Mintmark punched into the Die by a Mint Employee that was crosseyed!


Frank

 

I was thinking maybe one to many cups of coffee