Possible Roman coin id

[GPAZ]

Can anyone I'd these coins? They look roman, but I can't find an exact match anywhere. They both have copper/bronze showing through in a few tiny spots which is a little disturbing particularly for the "silver" looking one. The penny is for size comparison. These are from my friends uncle who recently passed away. He collected everything.

 

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[l.cutler]

Can't help a lot, but they are Roman. Don't worry about the copper showing through, Rome continually debased the silver coinage until they were copper with just a silver wash.

 

[TreasureCatto]

The do look Roman. You may have what is called a Fourree.

 

[Mackaydon]

The reverse could be described as showing the goddess of peace, Pax. She is shown standing left, holding olive branch and transverse sceptre.
The obverse shows a radiate draped bust right (3rd century AD) crown of spikes.
The 'SP' adjoining letters are found on coins showing several emperors of that time (Gallus and Vespasian, for example).
Don.