Dads further thoughts:
Just to help on Villagenut’s correct ID of a CONSTANTIUS GALLUS coin as it will not be found on the Wildwind’s site being a rarer variety.
The coin obverse (Front) inscription is DN CO[NSTANT]IVS IVN NOB C Centenionalis type AD 351-353 bare head right with ∆ behind.
Reverse (Back) inscription is FEL TEMP REPARATIO (return of good times) Soldier spearing fallen horseman with •S• in left field.
In the exergue (base of reverse) is the mint mark of [A]SIRM. This is a SIRMIUM (now Sremska Mitrovica, Balkins) minted second series.
Reference is Roman Imperial Coinage Volume VIII page 387 Sirmium 46.