I agree with @PeteB Crispus, Caesar AE3 321-324 AD Obverse: IVL CRISPVS NOB C, laureate head right Reverse: CAESARVM NOSTRORVM around VOT X in wreath Mintmark BSIS sunburst I like that mintmark! I've not yet seen a sunburst.
Obverse: IVL CRISPVS NOB C (Crispus Most Noble Caesar), Portrait of Crispus right, laurel wreathed Reverse: CAESARVM NOSTRORVM (Our Caesar) within wreath, VOT X Mint: Siscia
Constantine (his father) eventually had him rubbed out, unfortunately. He was tough on relatives. Think of the godfather.
I like that you all answered me Thank You. I can not see that it is a Crispus because there is a NIS on the obverse, not a PUS unless it is a translation. I also checked Licinius , WOW Constantine really was tough on his relatives.
This one matches yours except for one letter but will serve to compare letter for letter. Each die was cut individually so they vary more than modern hubbed dies. This one is from workshop three (gamma before SIS) while yours is shop two (beta before SIS). As these go, yours is reasonably clear except for the C in Crispus which I suspect was damaged when the coin was cleaned too aggressively. Reading these coins takes a little practice. The abbreviations take a bit of practice, too. IVL is short for Julius and NOB C is his title as 'Noble Caesar'. I suggest you look at coins posted by others here and try to match up the letters as best you can. In a little time it will get easier.
Thanks for the answer you gave and the coin for comparison. I will spend some time on reading the coins from now on. I also was not aware of different workshops for minting. Awesome coin you have there the devices are very sharp.
I have one with a G in front of SIS. I can't post a photo just yet as my camera is down. Any idea what that might be?
Here's an example from a different officina at the same mint: Crispus, AD 316-326. Roman AE centenionalis, 2.93 g, 18.2 mm, 6 h. Siscia, AD 320-321 Obv: IVL CRISPVS NOB C, laureate head, right. Rev: CAESARVM NOSTRORVM around wreath enclosing VOT X; ЄSIS* in exergue. Refs: RIC 165; Cohen 44; RCV 16772.