Help with some pocket change error coins, Please

[tymcmurray]

These are the error coins I have found since winter.
I don't know a lot about this, so ANY advice would
be appreciated! Thanks!!

 

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[Emperor Findus Cladius]

#1 - Die chip. Use to be pretty common among wheatbacks. In fact, some collectors tried to get a full set of them.
#2 - Looks to be struck thru grease
#3 - Die chip.
#4 - Collar error. Pretty common.

 

[tymcmurray]

Thanks! I wasn't sure what to call them.
I appreciate you help.

 

[Klaatu]

1) The first photo is too blurry to see the "error" clearly but it looks like it could be 1) post-Mint damage 2) die scratch or 3) die chip.

2) Grease-filled die

3) Die chip

4) Partial collar - there may be some error collectors interested in this one