These are three different coins in sequence. First two are one coin, second two are the second, and the last two are a third coin.

@user_21858
These are three different coins in sequence. First two are one coin, second two are the second, and the last two are a third coin.
The first one with some of the patina missing appears to be a coin of Domitian. The second one looks like Julia Mamea. Both are from the Roman Empire. The third one is a bit too far gone for me to be able to attribute correctly. Look around on the Wildwinds wesbite about ancient coins (http://www.wildwinds.com/coins/) to compare pics.