We have a sticky section here titled, Books, Downloads, and Websites, there you will find all kinds of information that will help you learn how to identify your coins and there are books and PDF's you can download for free. This section will give you many hours of study material. You should check it out. The 2nd coin you posted here is a Campgate of Constantine II from the Cyzicus mint.
The coins you have been posting appear to have been harshly overcleaned, this is going to effect the value of the coin.
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