Late Roman Bronze Coins

I just found this Byzantine coin in my Roman junk box. I do not collect these so I am at a loss as I cannot find any examples of a PHI officina associated with a Pentanummius. Can anyone point me to an example? The Obverse under magnification has a legend of (DNIVSTINVSPFAVG). The reverse has the Epsilon and a Phi. Thanks! [attachment id=0 msg=7770]

I know very little about Byzantine coins; but, if you haven't seen it, Dumbarton Oaks Collection is available online. Of course it may not help.

https://www.doaks.org/resources/publications/books/catalogue-of-the-byzantine-coins-in-the-dumbarton-oaks-collection-and-in-the-whittemore-collection-1

I have attached it as a .pdf...it is very large

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