Just received this one in the post..

Licinius II (320 ad)Follis.Siscia 3.00gr 20mm dia.
Obv.LICINIVS IVM NOB C.(Laureate head right)
Rev.CAESARVM NOSTRORVM (Wreath inscribed VOT.V
Mintmark (delta)SIS(star)
RIC VII Siscia #162 (Rated scarce)
Anyone know about the scarcity? And is my attribution correct?
Saludos Paul