First coin appears to be Constantine II AE3 Obv:- CONSTANTINVS IVN NOB C, laureate head right Rev:- CAESARVM NOSTRORVM around VOT X within wreath. Mintmark ASIS sunburst in exe. (I am guessing at the A) RIC VII Siscia 182 Second appears to be Constantine the Great AE3 Obv:- CONSTANTINVS AVG: Laureate head right. Rev:- SARMATIA DEVICTA: Victory advancing right, holding trophy, palm branch & spurning captive on ground to right Mintmark SIRM in ex. RIC VII Sirmium 475